It's all fine when we're making out, cuddling and gently touching each other's bodies, I easily get a full on erection then and when she's teasing me. Same with when I'm alone masturbating. But when I need it to be hard it's useless! It goes about half way and then goes away! Even when I'm getting a blow job from her. I don't have any bad feeling for the future because we're deeply in love but it's bloody annoying and a little embarrassing. Anyone with the same/similar problem? Help!