Don't worry! If you're pretty, guys around you already jerk off thinking about you. You'll just have to notice wich ones look at you more then ask them to do it in front of you, and that's all good.
If you think you're not that pretty, you'll just have to be a little sluttier. The boys will notice it very quickly cause they love that. It will be even better cause they'll have all kinds of dirty thoughts about you. They'll take their cock out at the first opportunity when they're alone with you. All it takes is one steady look from you.
Even Aphrodite would blush watching this scene! Imagine when this guy comes home from work in the evening and his wife asks him what he did during the day, and he replies, well, I fucked a sex goddess hard.