This is a previously unpublished version of this story. Some changes were made prior to posting on the EMCA. I haven't had time to finish the story from that (close) perspective, so I'm throwing what I did write up here... Jane, plain Jane, runs into problems when she tries to improve her love life...
There is a small mention of bestiality but not the main story. Searching for something different a couple see an advert for slut training, and after a discussion they enquire as to what it involves, and get invited down to a farm and are shown around and rules were stated, then sent home to discuss and think it over but the wife insists they do it and arrange for her to start training.
Commercial sex in a coldly impersonal hi-tech future: Vending machine sex. Gender change on demand.
And even human sex workers, who are sometimes capable of falling in love.
Cindy and Nina are two magical sluts whose pussies drool with desire for their male classmates. But a magical betrayal takes advantage of Cindy's irrepressible breeding instinct. Will she ever be able to control her lust? Those milk-lovers that would see how large Cindy's milk-spewing breasts can get need only to download this truly bizarre tale.