My girlfriend and I would be completely naked in bed and we would "dry hump". As in I would just rub my penis pretty much in her slit, but not exactly put it in. However, after a few weeks of doing that, I started putting the head of my penis inside her vagina, but no more then just the head. She would stop me, and I just knew she wasn't ready to take the whole monster inside. So the question is, does it count as sex?