When your girlfriend gives you one of those deep blowjobs and tells you that today is the day, that today she's ready, that today she wants it, that today she feels like you putting it in her from behind... when that day comes, which eventually comes for most people who are in a stable relationship... as I said, when that day comes, a sensation runs through your body, right? especially if you've never put it in a woman from behind and of course, that first time you notice that everything is tighter and that you have to put it in carefully, slowly hehe, but there's no doubt that the orgasm and the cum are much more intense.