Lynn brought up a great point. If you're comfortable enough to have sex with them, you should be more than comfortable enough to ask them to shower.
I've never done anything like that, so I can only offer speculation and my personal thoughts, but for myself,
that area is perhaps the most well washed area of my person at any given time (refer to Dane Cook's explanation of "The Triangle Scrub"

). For women, my understanding is that the average woman only produces so much lubrication naturally when aroused, certainly not enough to get "goopy." Perhaps damp?
The only time that I can personally think of that there's any scent of any kind is about when you'd expect: after sweating or after any sexual activity. I wouldn't think you'd be doing that after either of those times without your partner washing. Dunno about women, but my understanding is that there's only any sort of scent if your partner has a yeast infection, but that's bordering the edge of my knowledge on the fairer sex.
Hope I was of some help.
PS: Don't worry about it. The edit feature disappears after x amount of time. You were a little blunt, sure, but the other extreme is myself, who continually skirts around the needed verbs and nouns. lol I prefer blunt to "what the heck is he talking about?"