Personally, if I’m fighting some sickness my orgasms aren’t as strong. Same deal with orgasm intensity and libido if I’m worried about side effects (which is ironic). Not trying to discount what you’re experiencing just trying to offer other alternatives.
when I was on topical fin and got side effects, the…texture of my penis changed, it was more like I had hard flaccid, probably due to something with the prostate. Anyway, that’s another thing you can look for to see if it’s going systemic.