I haven't bought a porn mag since the late 80s, when video became available. I liked Penthouse and their frequent lesbian photo shoots. That was long before I even had any idea I might be interested in ladyboys. I blame/thank the Internet for that.
Didn't get on the Internet until around 1998. Then, I didn't discover my thing/fetish/attraction for ladyboys till around 2006, I guess.
I remember an Asian porn website that gave you a choice between straight or tranny porn. For straight porn you clicked on an image of a girl. For tranny porn, you clicked on an image of a girl with a cock. Whichever one you clicked on would lead you to that kind of porn. Intrigued, I clicked on the girl with a cock. That was it; my fate was sealed.