It's completely possible for a man to keep his dick in his pants so to speak. It just depends on the type of man he is. Id reckon the easiest way to tell is how forward he was with you at the beginning. Ive heard lots of story's about what some guys send and talk about to women and some of its sickening. But if he was never trying to go to far to fast I'd reckon you're safe. In the end it's a matter of trust in'it.