Let's start to give numbers:
how big for you is "BIG"?
what is that satisfies you more, length or girth?
for us (well, I better talk about myself) boys size is and will always be a problem, for me who i'm 6 1/2, for the one who is 8 1/2 and for who is 10, we would always like to have more.
the problem is comparison toward others, also my girlfriend says that i'm avarage and that she's been with much bigger ones but she also tells me (i don't know if to believe or not) that i'm the second one who gave her orgasm and that the first one was less endowed than i'm...
the first time she was with me she didn't ask my mesurements and she didn't watch at it before inserting... she only keeps asking what i do to her because she doesn't understand how my avarage one (compared to some other ones she experienced before) can make her feel what she feels like reaching her belly from the inside or having orgasms while she never got it before.
so, i'm not happy with my 6 1/2 x 5 1/3, i want a bigger one but evidence is that it works!
i agree that if it is for a one night stand it would be better a bigger one as for me it would be better one with big tits but to build a relationship some other things other than big cock/tits are involved and, hopefully, i have some ;-)