I have a fantasy of being the bigger cock in a situation like this:
One time, me and two guy friends were partying and drinking with three skanky girls, male-female-male formation in a circle playing some kinda card game, where you had to keep your hands off the table. One girl suggested the girls put their hands on the guy's dick on either side of them, the guys put their hand on either girl's tits. For whatever reason, they changed it to guys grab their own cocks, girls grab their own tits. We were fully clothed by the way.
I would later find out from a second hand source, that both guys were small to average, great ego boost to know I had the biggest dick in the room that night (wish I woulda known it then, so I could savor it lol). I can't help but fantasize about the two girls grabbing my package, and noticing that I had the biggest dick, or if it would have escalated to all of us naked and fooling around, and I was noticeably the biggest cock, getting the most attention.