Most Helpful Guy
kiss him and put your hand on his leg...1THIS IS NOT RELEVANT ANYMORE
Most Helpful Girl
If you're in public and trying to turn him on, put your hand on his leg and slowly move it up a little. Squeeze his knee. *Accidentally* brush your body against his when hugging or pointing at something, maybe he's holding something in his lap and you move close to take a look at it.
When you're alone at his/your house, get close, start kissing and making out. Really passionately. Move closer so you're bodies are touching. Move your hips towards his. Run your hands along his thighs. Then, put your hands under his tshirt and run them up his back or around his hips. Move his hands to where you want them if he's shy. Ask if he wants to take his tshirt off. Kiss his neck. Etc. Etc. He should get the hint.1THIS IS NOT RELEVANT ANYMORE