My character Ryzer the Lemur.

Ryzer was once part of a thriving, prosperous family. But raiders came in and killed most of his family. His sister and he were then captured, and a curse placed upon them. Their personalities and bodies were turned into one, and sold as a slave for other's pleasures.

Rather than becoming a herm, he instead is now cursed to change between the sexes to whatever is expected of the person he's with at the time.