The well documented average for white males (blacks slightly larger, asians slightly smaller) is 5.5 - 6". This makes functional sense. The average vaginal vault is about the same depth. The prostate can be reached inserting the index finger up the rectum. Therefore, functionally, 5-6" is ideal. Anything more looks great in the gym, but is functionally excessive. I'm on the large side... 8.75 x 6... and in my teens found it to be an impediment to sex. When most girls saw my size, their reaction was usually "You ain't putting that thing in me." So, usually I had to settle for a hand or blow job. Now that I'm in my early twenties, I've found more experienced women who are much more compliant, tho some don't want me to go "too deep" cause it hurts if I'm banging against their cervix. With guys, I have to be very gentle, quite a little finger work in preparations, lotsa lube and very careful insertion. However, once I'm totally in, some like a slown and easy stroke and othrers prefer rough sex. Thing I like about guys is that I can get all the way in...which I really enjoy. Also, prefer being sucked by guys...they know what feels good and are less mechanical than women. Hope this helps...and especially the guys who think they might be too small.