What is the difference between a penis belonging to any other man and a penis attached to a male who identifies as a 'transwoman'?
Oh, I know this one! <jumps up and down with hand up>
The mouthfeel of a transwoman's penis to a lesbian would be totally different to the 'mouth feel' of a male penis on a person currently identifying as a man. Hence why lesbians are scolded for saying they don't care how a penis feels, they don't do penises, and women are scolded for saying they don't care how a biological male feels between their ears at this point in time, they still do not want to deal with said male in a state of nudity or when they are undressed.
But I suppose this is only something you can process if you think women are actual people with whole internal lives of their own, as opposed to sub human service units whose lives revolve entirely around what the male in front of them directs them to see, think and feel.