Urges, all the urges!

I don’t know why but sometimes I get this urge to grab the first guy by the jaw and kiss him. I have yet to do it, but I don’t know why I feel this way. It happened with a band mate of mine. He was sitting at the drum set during our jazz band class and I had to fight grabbing him and making out with him then and there. He and I aren’t dating, and I haven’t acted on these urges. I don’t understand them. I just need help to find the root of the problem. Do any of you other ladies out there feel the same way? Have you acted on those... urges?