I was at a new years party with about 10 friends (half girls) and the women wanted to know who had the biggest dick after a while of drinking.
A couple of the guys were reluctant so I came up with the idea that we would whip 'em out and they could compare but they had to suck us off.
It kinda worked...got them to suck our dicks and get us hard but after they did it and compared us they never finished us out. (I didn't figure they would)
I won though (by enough to smile about

) and I ended up having a good time with one of them that night too (my prize).