Frankly I probably wouldn't bother playing a game that offers such a choice...
Here's the thing: the whole 'who has the biggest dick' sounds really pointless and childishly juvenile in real life and much more so when referring to games made with 3D models.....
As in dude, really, who cares?
On top of that I'd have to ask myself: can somebody this childish and this obsessed with trivial concerns produce an interesting story?
Logically the answer would be: probably not. Pass.