Easiest way to get an orgasm, is by playing with the feet, if you tickle them, and they laugh, do what comes naturally. Just play with them...
Feet are one of the erogenous zones. Foot nerve is connected to vaginal nerve. If any guy is having problem making his girl orgasm, try to give her a foot massage with warming oil by concentrating on the pads of her toes and the webbing in between. That should increase the likelihood of her experiencing an orgasm.