Usually that means the person has gone through hormones treatment so the masculine features had either gone or dimimish also long hair boobs and in manu cases some cosmetic surgery..
Some years back I went to the Meson Maya restaurant over near Fair Park and they were having a drag show. Some of the performers were wearing bikinis and from my vantage point I could have sworn they were smoking hot real women. I'm sure there's plenty of guys that have been tricked because of how damn good modern medicine has gotten with their creations.
It's been a year or so since I saw them, but I had a full GFE experience with both, but of course YMMV. And they were much better looking in person, with friendly personalities.
As for porn stars, there are too many to name that are absolutely gorgeous. The great thing is you can follow them on Twitter or find them on Eros and actually meet them at T-girl club events or as an escort.
It has been requested in the past. I think is only reasonable to address a section of the market that is alive and vibrant.
But the mods/owners have not seen it this way.
It might be quite a complex/expensive thing to do... i mean, imagine having to insert a few lines of code...