Sounds like the guy is trying to be tender with you which is a good indication that he cares for you and not just wanting to f*** and go. When I first started dating my husband he used to do that to me when we were intimate and it kind of freaked me out. One day I was talking to a girlfriend of mine about it (who is much older than me) and she told me he was in love with me. I didn't believe her. I just thought he was kind of a corny guy but it turned out she was right. It took me a little more time but I did eventually fall in love with him and we've been married now for 8 years.
My boyfriend does that. I think it is because he really cares about me and knows how much I like it and how loved it makes me feel. We're really open with each other and have been since the start. Little things like the way a guy kisses you can show a lot about him. Tenderness shows care and love.