Many straight guys wear boxer briefs because they're much more convienant than briefs that are too tight or boxers that are too loose. They're the perfect middle. I use to steal my brother's clean ones and wear them as jam jams. So comfy!

(Plus boxer briefs just look better on men)

V-necks on the other hand...it's a NY thing for every single person to be wearing a v-neck. I'm even doing it now, but when it's a super deep v that's when I have to be like naaah. Or when they have cheesy chest hair. Not regular chest hair. The Ron Jeremy kind.