It’s apparently supposed to make a distinction between trans people before/after bottom surgery. I doubt that’s a common use for that word, but I still have a few points against that specifically:
- I don’t think it’s ok to make a distinction those in this way
- It straight up ignores that not everyone wants bottom surgery
- It’s not even the way ‘-sexual’ is used normally.
Most people just use it interchangeably with transgender to my knowledge.
If I hadn’t heard of it in context it’s commonly used in, I would think that it’s the attraction to trans people.
Idk if I’m making any sense here, I suck at saying/writing things that do
I like using it as a joke. Dated terms are valuable replacements for slurs in places that aren’t friendly to this level of obtuse joke telling. If someone used it in the way you’ve described it, I’d be upset with them. Using it as a slot in for transgender is acceptable, but again, dated.