Guy here. When I'm not with my partner I usually see my libido as a nuisance so I masturbate to relax/get rid of the feeling. When I'm with her though.... Yeah I most definitely definitely prefer the sex. We actively communicate and critique the others technique or reward eachother for a good thing. Either way if your sex with your partner doesn't make you orgasm as well as you do yourself, then you either need to communicate more or "spice things up". Nothing wrong with that