I tip if the companion has a problem watching the clock and keeps on playing with me well past the scheduled end, particularly if the extended ride is really good. Otherwise, no.
Personally, I believe the greatest form of appreciation I can show a lady that has spent extra time with me or rocked my world in some out of the ordinary fashion is to write her a good review, or email a circle of buddies about her or immediately reschedule with her for another appointment.
I cannot wrap my mind around "gifts" or tips for hookers.
I don't tip either. I always do the same thing. I lay the donation down in plain sight and excuse myself to the shower. A few exceptions have been when I have go way over time humping on MSOG.
Really you think that any provider in their right mind would say hell no don't give me no xtra I should give you some cash back. You rocked my world.....
Or
You cheap bastards better tip my ass. You can't do better than me...