As a real living and breathing female on the internet, I would mostly second this:
xeenith wrote:if the goal is for the girl doing the tease to identify herself in the model while copying the scenes, then the model is to be of the same gender
if you want to present a master/mistress to give the orders, then the model can be either gender
I'm bi, so I really could go either way, but my experience has been that most of the teases meant for women which use pictures of only men use pictures from gay-oriented sources. That's not necessarily bad, certainly the
vast majority of porn is created for a male audience no matter who the camera is pointed at, but for some reason it feels especially out of context for me when it's a gay male model that I'm supposed to imagine is interested in telling me to do (or not do) something. I don't know if that makes sense, there's probably a better way to explain it.
Anyway, there are better places to go if I only want to look at sexy people doing sexy things, the teases here are fun because of the writing or the instructions. I've gone back through several teases probably a dozen times, not because I especially liked any of the images any of them used, but because those teases were hot.