Not all boys do but it is common to experiment from the beginning of puberty to well into adulthood. It depends on the person how long they experiment. If you are referring to yourself then don't worry about it and experiment. It is okay to be in the closet about it at first, it is a hard thing to tell people. If it is a friend or something then pass this on to them please. I hope this helps. If you want to talk more about it then check out my profile and shout or message or something, I will talk to you about it.