Luke waits until you are completely ready (till you give him the greenlight hehe) and then when you are you surprise him with a very romantic gesture.
Ashton waits until marriage because he is very religious and wants to wait.
Calum pounced on you when you come home from work and he is in your house waiting for you.
Michael and you met in a club, where everyone was drunk, but not you too, after having sex that's when he asked you out.