My sister is and I are both petty much entirely asexual. As such instead of dating or having partners otherwise, we just do everything together. For all platonic purposes, my Twin is my SO.

Indeed, our best friends of more than than a decade recently observed that in the entire world time they've known us, they have never actually been around one of us without the other, and that it was a wee bit creepy.

I've relatively recently realized that I am attracted to her. And on the whole I'm much more interested in relatively innocuous displays of affection like handholding and back rubs, I'm still pretty uncomfortable with it, so I'm going to shit on this shit forever.