My boyfriend turned me into a bottom. How do I get back at him?
Fuck his mother.
Even if she doesn't turn you on, think about how fucking her really means you're just doing the ultimate act of domination to him, and therefore you're topping him psychologically.
>give me a scalpel and we'll see how you feel about that
Big difference in someone with a scalpel and someone with a dick. They may flip and fuck you but that does not"turn you into" a bottom, you either are, or decide to be, no one else can "make you" be one. It may feel like it sometimes, but dicks are not magic.
Oh, well. That's a serious issue you've got there.
Since he hurt your pride, you need to hurt his. The male pride is centered in the penis, so you'll want to besmirch his phallus somehow.
What if you encircle his member with your anus? Then you can act like you're pooping out dick, thereby equating it, and his pride, with shit.