First of all, I'll give you the benefit of the doubt. Just in case you ARE legit, and for any who are in a similar situation for real, and might benefit from a serious answer. Secondly, he was likely just embarassed---few teenagers want to talk about ANYTHING private or intimate, especially anything sexually related. Not unless they are going for shock value. Third, give that your age difference isn;t all THAT much, he may have felt uncomfortable with you in the dad role in THIS case, because there wasn;t enough of a generation between you. If I had to guess, I would say that he eventually came out of his room, and just avoided the whole topic completely. Frankly, given how teens are, and we all did it, I think the best way a "talk" can be done is to offer to answer any questions, and to provide information he ca review on his own that you have pre-screened, to check to make sure it is true and relavent. THis avoids most of the embarassment factor for both, yet still provides needed information. If he is still a bit freaked out about it, and there is a favorite uncle or whatever who he DOES talk openly with, then let him find out what is wrong, and DISCREETLY let you know---do NOT let on where you got the information, or the son will feel a broken trust. It's always tough to deal with touchy subjects in this context, so just do the best you can. More than likely, both of you will survive the experience, and laugh about it some 20 years from now over a beer. Good Luck!