My experiences with women have been just as tiring as men. Granted you aren't sucking on a long, thick stick, but sometimes women just don't want you to stop. Most women have multiple orgasms and to be real, woman on woman encounters are limited to tongue, fingers, and a strap, if you have one, which i do. I absolutely love giving head to a man, but it ties into my cum fetish. I can cum just off of giving and if i have lock jaw, i take a break by doing something not so demanding like licking and sucking on the balls until that jaw feels right.
i mean...i know nothing.