Yahoo Answers is not where you go for a sanity check. (Or any kind of check, really.) The way he expresses himself says that he is not a rational person. A mature response to concerns like that is to say "Hey, I saw these videos of salsa--is this what you want to do? I'm uncomfortable with that, can you explain?" Not to have a tantrum and make threats. If he IS worried about her finding another guy while dancing, he's probably justified because she could do better.