When my son was 5, he asked the proverbial "where do babies come from". Then it was: "yes, but how do they GET in your tummy?" I knew it was time for some explanations, and told him in a a matter-of-fact way that he could understand. He accepted it straight away, and then seemed to forget about it. My younger son was extremely interested in his own bits and pieces though, and likened his testicles to ping pong balls! I did the same with him, and told him that he mustn't squeeze of press them too hard, or he could injure himself. I also told him not to touch his bits if people were around, as his body was private and it didn't "look very nice in front of anyone." Again, it was taken in his stride. If you have a laugh, and don't make a fuss about things cassa, everything'll turn out as it should do. x