AITA for not wanting my friend to borrow my Dior lipstick for prom?

A long-anticipated prom night became unexpectedly stressful after a simple request sparked tension between friends. One student carefully planned her look and splurged on makeup she normally would not buy, hoping the night would feel special and personal. What makes the situation more complicated is how easily excitement turned into guilt.

When a friend assumed she could borrow expensive makeup without asking, the refusal felt reasonable to one side and hurtful to the other. The disagreement quickly spread across a social network, where people weighed in on hygiene, entitlement, and whether saying no over something small automatically makes someone a bad friend.

‘AITA for not wanting my friend to borrow my Dior lipstick for prom?’

The issue started while prom plans and shared preparations were being discussed.

Prom is coming up soon and i’ve honestly been saving and planning for weeks. i don’t usually spend a lot on makeup, but i went out and bought a couple...

foundation that actually matches me, a setting spray i’ve been wanting forever, and a Dior lipstick i was so excited to wear. i wanted it to feel like a treat...

Assumptions about sharing turned the excitement into discomfort.

And the plan is that a few of us are getting ready together at one of our houses. when we were talking about it, my friend casually said she’ll just...

i kind of laughed it off at first, but she repeated it like she was serious. i told her i’d rather not share because i’ve been saving everything for me.

The emotional fallout left the poster questioning herself.

she immediately looked very unhappy and said we were friends, that it’s just "some makeup”. but it doesn’t feel like just some makeup to me.

i bought these products for one night i’ve been excited about, and i don’t really want someone else using them first or maybe breaking something. But the thing is, now...

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i know some people would just let her borrow it and not think twice. but i feel like i should be allowed to keep it for myself without it turning...

Personal items, especially those related to hygiene or self-expression, often carry emotional weight beyond their monetary value. In this case, the makeup symbolized anticipation, effort, and a rare personal splurge. Wanting to preserve that experience does not automatically equate to selfishness, even if others perceive the item as trivial.

The conflict also highlights how assumptions can create friction. The friend did not ask but instead implied entitlement, which can put pressure on the other person to comply to avoid conflict. When boundaries are crossed this way, guilt often replaces excitement, particularly before meaningful events.

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From a social perspective, learning to say no without justification is an important skill. Healthy relationships allow room for personal limits, even over small things. Discomfort often arises not from the boundary itself, but from differing expectations about access and sharing.

See what others had to share with OP:

Many users strongly supported the poster, emphasizing hygiene, boundaries, and personal choice.

stillrooted − NTA. Sharing makeup is unsanitary on top of everything else and nobody should make a habit of it. You're not a bad friend for being firm on this...

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Barbie-Necromancer − NTA, I am a theater major and actors sometimes get it into their heads that sharing makeup is a good idea. Not only can it spread diseases (pink...

most of the time the makeup is the wrong shade for their skin tone. Eyeshadows can be safer to share but only if cleaned and different brushes are used. POINT...

This is the kind of thing that can mess up your physical health, and you should be proud that your instinct was to not share. This is a bigger health...

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bronwen-noodle − NTA. She wouldn’t want to borrow your lipstick if it was an LA Colors lipstick from the dollar store. Don’t let her get ready at your house Also,...

EmJennings − NTA. Cold sores (Herpes Virus) exists and can be dormant for ages. Never share lip products, for the health and hygiene of everyone involved.

VelveteenDelta − NTA I'd never share lip or eye makeup. Even professional makeup artists never use lipsticks directly on multiple clients. They'll always use a brush and palette.

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Solid_Mouse_3354 − NTA. I draw lines at sharing anything lip related. No sharing of balms, lipstick, lip glosses or anything.

It's about hygiene for me, but I remember when I bought Lancome Idole I would not share that with anyone because I had to save up a lot for that.

I'm all for sharing, but as people, there would always be certain things that we would want to keep for ourselves because they denote something special. NTA, through and through.

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Others offered more measured takes, acknowledging both sides while still respecting the decision.

Eichmil − NTA. It's entirely natural to want to keep a luxury item for yourself, especially on its first use. If you buy a sports car, would you be OK...

If you buy a bed, would you be OK with someone else sleeping in it first? If you get married, would you be OK someone else trying him out first...

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lastunicorn76 − Sorry but makeup is very personal. It’s not something to share. Bacteria and viruses can easily transfer through makeup products. Treat makeup like a toothbrush! it’s best to...

If anyone asks you just say No due to hygiene and infection risk. Period. Not up for debate, discussion or personal opinions. It’s your boundary and your personal items.

A few responses lightened the mood while still making their point.

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starawings − NTA, it's kinda gross to use lip products with multiple people, the only way that would be acceptable is if you use a make up spatula to take...

Stand your ground, you bought it for yourself to use, she can do the same. She is not entitled to your products. Also her dismissive attitude, "oh i'll use some...

am_Nein − NTA and OP do not let your makeup out of your sight. 100% your "friend" will try to do a fast one on you and laugh it off...

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At its core, this situation is about respecting personal boundaries and understanding emotional value. The poster did not lash out or insult her friend, she simply said no to sharing something meaningful and personal. While guilt is a common reaction, it does not automatically mean the boundary was wrong.

Should friends always be expected to share personal items during big events, or is it reasonable to keep certain things just for yourself? Where should the line be drawn between generosity and obligation? Share your thoughts and experiences in the comments below.

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