Straight 27 frat dude Alabama needing advice from 35+ on men’s underwear. DM’s opened

[Background] Straight 27 dude lives in Alabama. Always been curious but never have done anything physical, talked to, flirted with, etc. nothing with a guy before. I started college later in my 20s and then joined a fraternity. Currently, I live in the fraternity house with 14 masculine guys all living upstairs. We have an opened bathroom and locker room situation along with opened communal showers. I have no siblings so I’ve never thought about the type of underwear I used since I’ve never really been in these situations. I’ve always worn Hanes and fruit of the loom white, grey, blue, and red tighty whitie briefs. The guys are constantly teasing and making fun of me because no other straight guy 27 wears tighty whities and stuff like that. I’ve also noticed through all of this that I’ve always had a major fetish for men’s underwear like briefs and boxer briefs this entire time. So with the teasing and everything along with figuring out about the men’s underwear fetish the communal bathroom is just an experience.

[Question] your age, are you gay, straight, bi along with do you wear boxers, boxer briefs, or briefs? Is it weird that a straight guy my age is wearing tighty whities still? What do think when you see a straight guy in tighty whities? Is it weird I’m straight and have a men’s underwear fetish?