Hey I need some help please???!!?

so im 17and i've done it before with my ex gf but i want to do it again but without prostitute. i'm quite a fit guy go to the gym an get complimented by hot girls for my six pack an muscles etc.. alot. what i want to no is how to get off with some of the hot girls i meet i make out with loads though. i heard that some guys g to the beach an like go nude there then go back home an do it is this gd way or can u suggest other plz???