My current girlfriend is 30 and the first several times we had sex she felt like a virgin, she was so tight, shed wince and say it hurts as I was getting it into her and she wold back off my cock if I tried to get it all in saying it hurt. Now she has loosened up but I still feel my cock head bottom out in her. Now on the flip side, my previous girlfriend has always been much more sexually active and is looser. I still feel my cock head bottom out in her and while she loves it she says I'm too deep. But as I said she is loose but always so wet and a good fuck as well. I'd say most of the girls I've been with were tight, some very tight and saying they are not used to someone my size. I have been with a few that had kids, one had two kids, was in her mid twenties, and was very tall for a female (5'11) and although sex was great she was probably the most loose of any woman I've been with. Personally I love stretching out the tight girls, knowing that once they have adapted to comfortably take my cock time and time again, that although there are bigger guys out there, statistically her chances are smaller cocks and I have made her loose for the next guy shes with. Many girls have told me I have ruined them for the next guy. However, I have had one guy do that to me fucking an ex that I still occasionaly fuck and she is much more lose as a result. Win some you lose some. But she still gets off fucking me.