There could be multiple reasons… pheromones, your hand-washing skills are not as hot as you think, or perhaps the area of concern is your upper lip, rather than your hands.
May, or may not be relevant. Depending on your date of course.
You aren’t wearing woolen gloves when you…well…y’know, are you?
Risotto is the plural of vagina?
I have so much to learn.
Concave or convex
It could fit either sex
With attachments for those in between
–unattributed British limerick
I’ve eaten risotto. In public. With a white wine, starchy tablecloth, candles and everything.
Someday this odor’s gonna end…
So, you were eating out?
Vagina shouldn’t burn. Odor is one thing, but a burning sensation is quite another.
Vagina: Melts in your Mouth, Not in your Hands…!
…and now, for a limited time only, if you can find and lick the hidden ‘mini’ in vagina, you may win a prize!
"Hey, I got ‘Sorry, Try Again’ "
“What’s your point…?” 
Wash your moustache, not your hands.
You sure that was the vagina?
Damn, I can’t think of anything funny to say, so I’ll go with a (maybe) factual answer. Try washing your hands immediately - don’t let the fluids dry. As with most stains, it’s harder to treat once it sets.
Dude, don’t make me do all your thinking for you. You definitely need to look for a new partner, maybe some new soap. If that doesn’t get rid of the ‘not so fresh’ feeling, you may need to cut off your hands. Normal odor does not stay with you for days on end like an alcoholic friend whose wife has booted him.
Get off my case already. Oh wait, you said soap, carry on.
I didn’t know the Y had such deluxe accommodations.
Penetrate that vagina with extreme prejudice?
Wait a minute. Stump-fisting sex eliminates embarrassing vaginal odors? Consider ignorance fought.
How come I don’t see Novartis selling That on TV every 5 minutes…?
Have you considered that you’re maybe working the wrong hole? Have you noticed anything brown?
Har har. This brings up part of my point though. I’ve had feces on my hands, I’ve never smelled it again after I wash them. I was wondering if there’s something to that. I may have been answered in that I’d wash my hand much sooner after getting feces on them than I would after having them in/around a vagina.
Reminds of an experience I had while heavy petting some time ago. The girl was really getting into it, and after a while she whispered breathlessly into my ear, “do you want a glove?”
“Hmm?” I responded.
“Do you want a glove?”
She didn’t have the type of odor that plagues Snarky_Kong’s love interests, so I didn’t really see the need. But I thought that maybe she had some serious kink in mind. “Why not?” I said. I was mildly amused at the thought of her coming prepared with, and pulling out, some kind of latex glove. And I could only guess at what would come next.
She laughed and said, “You’re funny,” before pulling me on top her. It was only then that I realized she had been saying, “do you wanna make love?”