I think that is part of the beauty of the attraction to Tgirls
Some guys like to penetrate
Some guys like to be penetrated
Some guys will get down in any old freaky way
Some transsexuals like to be penetrated
Some transsexuals who are pre-op like to penetrate
Variety is certainly the spice of life, as long as its two consenting adults doing what they want, its all good.
Since I strictly like to penetrate, I used to believe that guys who want to be penetrated were secretly gay or something, not that anything is wrong with that at all. I then realized though that some pre-op transsexuals like to penetrate guys. If they like to do that then what does it all mean.
The only hard and fast rule I have is I have no desire in being penetrated, but everything else is fair game, I'd even be willing to give her a blow job if she wants that area pleasured.
I'm dominant sexually and therefore like the submissive side of transsexual women, on the other hand there are guys I realize who are submissive sexually and like the dominant side of a transsexual woman. That I think is the crux of it folks.