My understanding is that asking the sexual orientation question is illegal at least in some states. Personally never been asked that by any employer in CA.
https://www.sos.ca.gov/business-programs/diversity-boards
The simplest way to game this is to claim to be a bisexual. This is even easier if you’re already married, since no one will expect you to prove it.
The ranking is referred to as the "progressive stack". Arguing over which groups go where is called the "oppression olympics".