I spent about 13 years (10 of them married) with a woman who wouldn't entertain the idea of oral after penetration. Not even me eating her. This is a real shame because for many of those years, sex was usually the same, I'd eat and finger her until she came (the only way she could cum) and then, with no chance of her cumming again I'd fuck her. I take a while and usually needed to be finished by hand, her being "too sore" and with no chance of any oral from her. Sex was nearly always me eating her, a fruitless fuck and a jerk off, which i'd sometimes have to finish myself. Not the most connecting experience...
Since then I've had a lot more fun with a woman who found it even harder to cum. We'd play around for a bit, fuck for 15 minutes or so and I'd have a 'rest', sucking her to a huge, shuddering orgasm, which turned me on so much I'd often finish a minute or so after plunging my diamond hard cock back into her engorged, still spasming cunt. That and a million other combinations of fucking and sucking, often ending with me sucking my spunk out of her and ending in a passionate kiss.
I really wish I'd been more insistent with my ex wife but she was far more experienced than me when we met and I'm ashamed to say that I never really learned that breaking the 'no oral after penetration' rule was an option until after we split up.