Communication is key. Also no “faking it” so your partner realizes you did not climax. (gals do this too often) I feel the approach to the subject shouldn’t be to blame or short-comings (so to speak), but as a matter-of-fact on how your body responds. In discussions with girlfriends, we are creatures with erogenous zones that respond differently to stimulation. The clitoris and vagina are far from the only “go to” areas, but guys don’t always know that. Being open and able to talk about what works for both of you will hopefully lead to a more satisfying sex life.