2008-2012 I went to college. Stayed in the dorms from 2008-2010, almost all the guys wore boxers, you would occasionally see boxer briefs and I never seen anyone but me and another guy in briefs. At night it would not be uncommon to see guys in boxers walking around going to their friends dorm, etc. American Eagle was by far the most common brand of boxers. Literally everyone wore them. Aeropostale was pretty popular too and you'd see some fruit of the loom or Hanes boxer briefs here and there.
My roommate had a girlfriend and they were always fucking, so I hung out a lot in one of my other friends room. He had a roommate that usually wore boxers but one day he was shirtless and had a pair of shorts on and they were sagging and he had a pair of what I thought were boxer briefs on, they were hanes with the gray "Hanes" waist band and black and my friend was teasing his roommate about sagging and tugged his shorts down and they were not boxers briefs but regular briefs and my friend started laughing and his roommate said "don't laugh at my "blackie wackies."
I never seen him in them again, but one night I fell asleep in their dorm, my friends roommate went home Thursday after his classes and it was Friday night and we had been drinking. I remembered I had to meet some class mates for a project for one of my classes in the library at 10, I woke up at 9:45. I took a shower in their dorm and asked my friend for clothes and he gave me some jeans and a polo shirt said "I'm out of clean boxers, check to see if Taylor has any, I've been wearing his." I said OK and then he said, I need to shower too, I'll check and he opened Taylor's drawer and said "I call dibs on the boxers, you can wear these and threw the black briefs at me." I showered, wore them, went to work on the project, met my parents for lunch and went back to my dorm, and took a long nap hoping my hangover would go away. I slept until night time, I got a phone call from one of my friends inviting me over to watch a ball game at the apartment complex he lives in near campus.
The semester was almost over, it was in May and was already hot. One of my friends said "lets go to the pool and swim, they opened the pool." He gave a few of my friends some swim trunks and gym shorts, but ran out and told us to "swim in your boxers." I had been drinking and completely forgot I had on briefs. 3 or 4 of the 10 or so guys that were there were in boxers, the rest in swim shorts or regular shorts.
So everyone was in except me, they kept urging me to get in and a hot girl I was talking too, we were the only ones not in the pool, so she actually stripped to her bra and thong and said, you come in too and I took my shirt off and unzipped my jeans and realized I was wearing briefs and a lot of the guys were laughing and she looked at me and laughed too, I just shrugged it off, folded my jeans and went I bent over she said "damn, nice ass bro" so I was feeling cocky and confident and jumped in.
Later on, Taylor, my friends roommate, actually showed up to the pool, I didn't see him there and he came up behind me and slapped my ass, laughed and said "hey those are my blackie wackies you are wearing." I said they are mine now.
I spent the night with the hot girl I met there, she lives in the apartment complex. I presume we fucked, b I don't know because we were both drunk. I just remember waking up in her room and we were both butt naked. When she woke up she asked if I wanted to go to get breakfast and I said sure, I couldn't find my clothes. She said "I'll go check the pool, you could have left them there." Sure enough she found them but I said "where is my underwear, I hate going commando" and she said, I think they are wet because we both swam in our underwear and sure enough they were, we actually left both of our underwear on her balcony and it rained so they were wet. She said she would wash them and get em back to me and we laughed, she said "I look like a whore with underwear drying on my balcony."
She never gave those briefs back to me. LOL
When I got my apartment in 2012 with some friends, I noticed that most guys started wearing boxer briefs exclusively. You'd see someone in regular boxers here and there, but then it seems like boxer briefs took over their popularity.
I went back to grad school, though never finished in 2015 and used the gym on campus since it was free (well tuition pays for it) and most of the guys in the locker room were younger than me. But I even heard one guy, tease someone for wearing boxers and the other guy said "Hey, it's laundry day" in defense of himself.