I have recently found my son touching himself. I have a 2 year old daughter as well. Once I found him with her in the bathroom trying to get her to touch his penis. But most recently I found him by himself trying to suck his own penis. When I asked why he said that he just wants to be a girl. He wants to wear makeup, dresses, etc. I tried to not overreact and be calm but this is very alarming. He said that girls are pretty and wants to be like them. He has always favored "girl" colors, but one the other hand he likes his trucks, bikes, cars, etc. What should I do? Is this serious or just something that will pass?