My buddy and his wife spent months teaching her how to do it..... instructional videos, practice practice practice. He was very driven and she was game but it honestly took a lot of work to figure out what did it for her. But once they figured out the trick, its almost like stupid pet shows now. Lol They have started soft swapping and that's what they all wanna see... the other gals have been very interested.... its almost an urban myth of sorts to some, which explains the interest.
FYI I don't believe there's too much FIV involved for her its a favored toy and technique that does it. From their homework they learned its possible for any gal, but the means of achieving it varys greatly from girl to girl and it can take a lot of practice to figure it out. Plus, many women have a hell of a time letting themselves go to that point. Once those issues are worked out its relatively easy to replicate.
I still half think they're just pissing in the air