Im 16 and I started masturbating since Im 10. First, you got to have a pillow. Point the edge part in your clit and start humping. It's like your really having sex without the penetration thingy. I can hump fast or slow but it really makes me feel incredible. This is the technique I've been using that been so useful for me this past few years.
Im 14 and I have a decent sized butt I just dont know how to use it on the pillow :(