hi my 4 year old likes to masturbate a lot. he likes to hump instead of using his hand. I started noticing this about 4 weeks ago. i try my best to pretend that i can't see him doing it without making a big deal out of it. i'm not sure what to say and i don't want to discourage this bahavior by saying the wrong thing. from what i've seen he seems to only do this at home... no place else. but at home, he'll drop what ever hes doing and get on anything like its normal... the arms of the chair, table ends, pillows, you get the idea. personally, i don't care where/when/how it occures, i just don't want him to do it infront of other people.. what should i saw to him?