AITA for not wearing pants to a party?

I’m a 21‑year‑old college student living the frat life, proudly gay, and apparently the only one in my house who’s also gay. The campus throws an annual post‑finals bash called “Split a Suit” — a fancy way of saying everyone has to divide a suit into two outfits. The usual scene: guys sporting shirtless blazers and suit pants, girls rocking oversized dress shirts, ties, and… no pants. Think prom meets “The Bachelor” meets “Broke…”.

I didn’t want to be the odd one out. I approached a fellow classmate (he’s also gay, so I wasn’t losing my mind) and asked what he’d feel comfortable wearing. He said he preferred to dress up, so I promised him a dress shirt and pants, and I would handle the rest. The result: I strutted around in a blazer, was shirtless with a tie, and wore boxer briefs. To me, that was the perfect “split a suit” moment.

Everyone else seemed fine with it. But then a friend’s girlfriend walked up, offended, saying I was making girls uncomfortable. I left, feeling embarrassed. My date accused me of lying about the party vibe and called me an AH. Now I’m a self‑proclaimed jerk. Am I the asshole?

• NTA boxer briefs cover everything a swimsuit would. As a woman I would not have a problem with it.
• Yea, the girl complaining is just sexist.
• Or homophobic.
• I bet when she said the girls were uncomfortable, no one else said a thing to her and she was the only one who was uncomfortable.
• As a woman, I would have been delighted. And there's an extremely high likelihood I would have tried to convince my date to go full Tom Cruise/Risky Business.

TL;DR: Dude was fine, only the girlfriend got a little jealous of his blazer and boxer briefs; probably not the worst fashion statement ever.