I've frequently been masturbating for the last 15 years, daily (34M). I thought this was a normal habit since I never had a girlfriend and only had sex 1 time. I needed something to get off to? Well little did I know I likely did some long term damage to myself. Recently (last year), I've noticed a huge drop in my libido, urges for sex and everything in general. 3 months ago, I found a girlfriend. I've had sex with her a few times, 6 ish? Everytime, no issues getting hard, but issues with sensitivity, libido. This causes the point where I can't finish inside of her like she pleases. She asks whats going on, I tell her its just different, I'm working on it, and I haven't finished within girls before. She tells me its the only way she can climax. I'll just keep going at her in missionary position without feeling any closer. Then she'll cut it off if it doesnt happen. I feel pressured. I just can't get there during penetration. On these same days if I play with myself enough I can get there (looking at porn typically). She does not do foreplay the way I normally get myself off. Would it be wrong to play with myself to get myself going before entering her? To address this, I've gone to my doctor, had my testosterone checked. It was at 350. The free testosterone was in the middle of the range as well. I've also quit masturbating to climax, but notice if I do watch porn and edge I get sensitivity and the drive back quicker than without. It's been 2 weeks so far without much improvement in sex drive. Any solutions you might suggest? I might add I saw my general doctor who gave meds but it's not ED, its just a sensitivity and a sex drive issue in general. I should also mention I lifted weights heavily until up to 2 years ago. That is when I started to lose mass, thinning hair, and libido dropped. I've recently got back in the gym. Just hoping someone can help me, I'm just worried I may lose girlfriend over this issue and all the stress its caused. Thanks all!