What are your fantasies during masturbating? Most important thing is that it's fantasy and in fantasy everything can happen. I am absolutely not suggesting that you make your fantasies become reality.
For example I fantasized about jerking off during school when I was younger. Of course I never thought of doing it for real.
Another example I like to fantasize about people I have sex with. Because those people can be of various ages it would never become reality.
This morning I jacked off imagining that there was a woman watching me and having a conversation with me. Would something like that happen for real. Apart from my wife. I don't think much women would appreciate such a thing. I came pretty hard though. Exactly at the time my wife walked in on me. That wasn't a fantasy. It was a bonus.