Recently learnt the origin of bisexual. It was in the 1800s and meant someone with both male and female genitals. Safe to say the definition has changed and therefore the fact the bisexuals like 2 as bi=2 definition has changed. The meaning of words change all the time depending on where you live in the world as well as new uses in language for that word.
Indeed the original term as applied to humans was what we would call Intersex now. And in fact even further back than that it was first used in botany for types of plants!
I think it was first applied to sexuality to mean that the bi person was assumed to have a brain that was male and female as they were attracted to men and women.
This idea is obviously very outdated and the word has been reclaimed from the medical use to mean what it does today!


















