So from what I understand it's fairly common for identical twins to have opposing personalities in some way. My sister and I fit this pretty well.

We've always been very close, as I imagine most twins are, much closer than other siblings. I won't go into detail due to how old we were when we did this, but we found out that I liked being tied up and she liked tying people up.

When we found out what bdsm was, it was a natural fit. Now as adults we're still in a sexual bdsm relationship. People's reactions to this have been mixed, some think that we're disgusting, some just think it's hot. But we enjoy it. And knowing each other so well, I can usually anticipate what she wants me to do next and she always knows exactly how far she can push me.

And since I know people reading want content I'll indulge you.

Last night before bed I ate her out while she read a book. I slept in her arms wearing nothing but a collar. Some nights she keeps me bound in bed, or in a cage.

She recently started anal training me. We had played with anal before but only fingers/small toys, but our goal now is to comfortably (as far as comfortably can be taken in this context) fit a fist inside me, so she bought a bunch of different size toys and we're working our way up.

She's bisexual, and sometimes when she has a boyfriend (she doesn't right now) if she's busy or just for fun, she will have me pretend to be her and have sex with him. It's fun for me because of the roleplay and because I'm doing it for her, even though I'm a lesbian personally.

Our birthday is coming up soon and I'm going to surprise her by getting "Vanessa's Doll" (her name is Vanessa, I'm Valerie) tattooed on the back of my neck, above where the collar usually sits.

Having this relationship with her has never felt unnatural to either of us. A few years ago because we were getting a lot of hate for our relationship, and a few times since, we tried being apart and just being with other people, but it never worked out. It may not last forever, but for now we're happy.