At what age did the boys in your family start puberty? the reason im asking is because my son is about to turn 10 and i accidently walked in on him 'playing' with himself the other day. I pretended that i didnt see anything to save his blushes and all that but ive also noticed when changing his bedding thst there are white stains on it. Now my partner is convinced he is way to young for all this to be happening yet but and that the white stains are a result of him drooling, but im not 100% sure. Obviously i dont wanty to embarrass him and im not going to mention it to him but just wanted to know if this is the start of it all