Delayed Ejaculation

Has anyone dealt with or gotten hit with delayed ejaculation? I typically experience this with a girl and it’s frustrating as hell. Meaning it’s very difficult to ejaculate from intercourse or oral sex etc. I am able to ejaculate through masturbation or with a girl (while masturbating). This isn’t constant but it’s been happening a lot lately. I did try cyproheptadine but that did nothing except make me feel ultra depressed.

Interestingly enough, when I had my crash from Propecia, I became HYPER sensitive and was able to orgasm incredibly quickly with my girlfriend which was quite different from my normal. That only lasted a few weeks during the crash/post crash.