I've masturbated and watched porn a lot in my life. I don't masturbate the regular way, I masturbate by putting my penis between my legs and squeezing while on my stomach (How did I learn this, I don't know). The first time I did something sexual with a girl was prom night. I was a week off porn and I could actually feel stimulation. The second time me and that girl did something I was two days off porn and felt nothing really. I got semi erect but barely any stimulation even when she was jerking my penis which was embarrassing.
A couple months later me and her break up and I start talking to new girls. Me and this new girl decide to link up and I didn't really feel anything with her either. Before we linked up, I was thinking about having sex with her and could get an erection but when we met up it's like everything just felt flat. She tried giving me oral sex but it didn't work. I was about two days off of porn during that time. Now I'm with this new girl who I really like and when we make out, I sometimes get semi erect but not fully. Most of the time, for some reason I watch porn and masturbate a day before I see her. How can I fix this, I've only had really success with the first girl and I'm tired of having this issue. I really don't want to mess up with this girl.