Does he know?

So, does a guy know when he starts thrusting with his hips when making out?

Background: I've been dating my boyfriend for about 4 months now. The first three I was finishing my last semester of college out of state. He's my first serious boyfriend (by choice, didn't want to date until I was secure in my own life). I'm choosing to not have sex until I get married and he's ok with that despite having partners before. So now that I'm home, the make out sessions are getting hot and heavy. The last few times I've noticed his hips moving quite distinctly... I'm not at all put off by it and know that he's aroused. I just want to know if he is aware of it when he is doing it.