River, to my way of thinking there is sexual orientation (one's own gender) and sexual preference (which gender you like to fuck).
I don't think either term implies choice.
Love withers under constraint; its very essence is liberty. It is compatible neither with envy, jealousy or fear. It is there most pure, perfect and unlimited when its votaries live in confidence, equality and unreserve. -- Shelley
Mags, F, 60, poly-dating, loving and living with
miss pixi, F, 38
Punk, 42, M (dating since Oct 2015)
and a few more casual relationships