I’ve thought about this, what you mean to say is you want to lick pussy with nothing in return but hoping she’s that horny that she will let you go all the way. That’s the truth of it
I used to pleasure a woman on a regular basis who has since moved abroad this way.
Have also been a sexual butler to a few couples where my duties have included orally preparing tge wife, fucklicking the wife and cleaning up, all with the hope but not expectation of earning a reward