How Is the Fantasy Not Ruined on Themselves?

I have dreams about the superheroes I'd like to be, just like any other healthy loser who hates his real life. But I have no illusions that I'm actually that hero. And I think that donning the costume and looking at myself in the mirror would decisively kill that dream at the moment I was supposed to fulfill it. Like having a girlfriend punch your balls right before orgasm... whatever that means.