. . . they provide BJs; upscale ladies give French lessons. Or is it the other way around.

Re:what does "French" mean?

Uncle needs to learn to treat ladies with respect.  Hobbiests don't use the term "brxxds."  If the lady says "you'll be satisfied" then believe her.  Assumption being that you have bought a VIP membership and done your homework by reading her reviews.  There is more to a lady than her pictures.

French = Blow job. Tip. do not EVER ask about details about the service on the phone, if it isint written down in her ad or on the website in details just don't bother contacting her. LE looks for dummies that are willing to talk about services, and they are a lot of them lol. So play it safe.