When a man gives oral sex to a woman and she reaches orgasm, and he swallows her mucus, does the mucus causes a man's breath smell stinky? And for how many days will it smell?

Kind of an odd question, don't you think?

Maybe if he brushes his teeth he will be OK.

You should brush after every meal, and floss. :)

I have nothing to say - all of the good responses have been used.

Oh, wait, one thing - if male on female oral sex is considered in any way to be "stinky," perhaps one (or two) should assume other positions. I think I'd be offended if my partner's #1 concern was how his breath smelled afterwards.

They don't just sell condoms at the gas station or pharmacy, you can get breath mints too. His or hers in your favorite flavors. Keep 'em in the bedroom or bathroom for when you go pee, or grab an after sex smoke. Be creative.

Just curious, does her breath smell bad after oral sex? If so, for how long?

I suppose it would go in both ways but the key word is "stinky," not "bad."

Stinky, bad, no difference in the glow of good oral sex. A pee and a cigarette is my only concern after. :).

The breath can wait until after the cuddle and nap. Okay I confess, I don't brush after EVERY meal. :(

Also depends if you have facial hair too. If you have it you could get some of her... excretions in your facial hair and that will linger until you wash it.