They basically said that the typical GG viewer wants to see women do stuff with women but doesn't want them to appear to like it too much, lest they appear
“Do not give what is holy to the dogs; nor cast your pearls before swine, lest they trample them under their feet, and turn and tear you in pieces.
It's one of those things to be indulged only with the greatest care lest we are overwhelmed by doubt and regret.
In fact in g/g scenes I think the directors often make a specific effort to minimize any height difference lest the scene look comical.
No I have not, but all I can say is to read the fine print carefully if you want to do that, lest it has some sort of downloads per day limit or such.