U grab your dick and pull on it back and forth
grab your dick with either 2 fingers or your whole hand and rap your hand around your penis and move it up and down a lot and watch a porn or something and you will cum or have a orgasm
of course, its a pleasurable experience for young and old, and there is no effects at all as far as i know, the rumours that your palms go hairy etc. arent true.-cowo8
Being a teenager can be very confusing, with all the hormones etc. I think the best thing to do is wait until you are older to decide on your sexuality