Hi I have a real bad fantasey of a girl using a strap on I'm submassive so that could be why but I was wondering if that's normal or not

There are thousands of nerve endings in the anus and while not all guys are willing to take it up the 'back door' some guys really like it.
A common misconception is that a male having anal sex makes him gay. No, not true.
You can get a wide variety of strap ons from pencil thin to scarily thick.

My partner would never admit it to anyone but we have experimented with this before (just a finger) and he said that although it felt a bit strange it was actually enjoyable, he was very surprised!

So in conclusion, no, I don't think it's weird at all :)

How old are you?

"Normal" has a very wide range...anything You like is normal for You...