It's been going on for quite a while and it's becoming more intense. I thought initially it might be the rocking motion that is the sole sensation but I'm thinking he's getting some genital stimulation from it because he likes to strip off before doing it (down to his pants).Whenever he gets really excited from watching dinosaurs he dives onto the sofa and starts humping. Local services do not offer sensory OT and I'm trying to find a private OT to see him. I've tried lots of sensory stimulating activities such as pushing him quite vigorously on the indoor swing,a wobble board, but nothing sticks. He's really increased his stimming too, progressing from gentle hand rubbing to clapping. Any ideas?