I've always liked erotica with a sense of humor. My all-time favorite (though his work is just about gone these days, except for a few rare copies found in internet used book searches) is Ted Mark (Theodore Mark Gottleib).
His main character was Ted Mark the man from the Organization for the Rational Guidance of Youth (O.R.G.Y.), a sexologist in the Kinsey tradition who had not only a permanent erction but the knack for finding himself in trouble.
There were eight or ten Man from O.R.G.Y. books in the series along with some stand alones like: I was a Teeny-Bopper for the C.I.A., and The Girl from PussyCat, the story of a ravishingly beautiful virgin girl working for a publisher in New York, who always seemed to be the victim of coitus interruptus under the most embarrassing circiumstances.
Of course, these books were a product of the late sixties and early seventies, as am I. (I graduated from high school in 1965).
Regards,
Scott