The first experience is always a nervous one for a guy because he will be constantly thinking about how he is performing.He could get aroused at the smallest act of intimacy on your part causing him to come to an orgasm quickly.If you are not a virgin, you will find the virgin guy especially clueless.Some guys are bad kissers but that does not mean they are virgins.
Kissing takes practice and people get good at it with experience.
Being physically intimate is new territory for him.
Even if he has watched several adult movies, the first real experience is bound to be overwhelming for a guy.
Similarly, some guys are great kissers and could still really be virgins.
There is a huge probability that he has made out a lot but for whatever reasons has not gone any further.