When I was twenty being REALLY turned on required no effort whatsoever. From about age sixteen until I was about twenty-five, it was if I had broken the switch while it was in the on position. One thing you might consider is allowing yourself the arousal stages but without the payoff. This will create tension that will build upon itself, and the longer you go without release, the bigger the reward will be when you finally grant yourself an O. You can also use this time to work on yourself. You have the freedom to explore your own body and find out what you like, as well as work on things that will make you a better lover when you find a partner. Great sex requires an investment of time and effort, and arousasl is literally just the beginning. It seems that men are especially prone to think of sex as a two stage process consisting of "Horny" and "Orgasm". Not only are they destined to be lousy in bed, they also are going to miss out on some mind blowing experiencess. Ultimately it isn't about finding your biggest turn on, its about what happens next. Being turned on and having a huge orgasm are just alpha and omega. A start and a finish. What lay between the two is the best part. Put your efforts there, and you won't be disappointed.