I know, sounds "old"
but try to think this:
Have you ever noticed that in a shemale-based porno video the male submissed often (i could say about always, but cant do) do the various things that all we love with a bit of stress?
No passion during the blowjob (and never a swallow)
Very poor kissing
And the final in rare with a facial cumshot, much more rare a mouthful, that would be really more realistic and nasty.
Do u agree with me or it's only my impression?