Oh wow. Found this. Guys. Read the first part. Dfk explained by am escort in 2007.
https://merb.cc/vbulletin/showthread.php?32742-Is-LFK-or-DFK-are-that-importants-!
i remember that post, it always stuck with me. There is a lot of truth in what she says, as it pertains to a lot of sex workers imho. But it is not the whole truth. There are definitely times where the kissing is voluntary and reciprocal, or maybe the act is not viewed by the provider as being so intimate that it cannot be delivered.
One thing i learned over time is to never initiate kissing with a new provider early on in the encounter. You have to wait and read the signals, you have to gain some trust, even if it is only 5-10 minutes...
but from my perspective i admit i love it when the provider agressively initiates deep kissing, not really giving me a choice...fucking turn-on