Now, we're obviously not therapists, so I'd certainly recommend visiting one of those... But I see sort of two lines here: -Are you comparing yourself to other people that you deem more worth than you? -Do you think your sexual performance/prowess is diminished because you're not similar enough to those people? I mean, both of those lines are basically kinda silly (not to be rude, but to sort of bring things down to a very practical level). You're not them, and what you do isn't what they do. I get that we're very likely to measure ourselves to our surroundings, but we gotta realize what's reasonable and makes sense.