Quim is kinda Victorian; it's a Latin word for the vagina and literally means
sheath. Victorian (and pseudo-Victorian) sex slang can be amusing if used ironically:
furze and
gorse are both terms for a woman's pubic hair, for instance, and yadda yadda. There are surely websites devoted to listing these kinds of terms, even if you don't have copies of
Fanny Hill,
My Secret Life,
The Way of a Man with a Maid, etc, handy. And I'm sure Neil Gaiman uses Victorian sex slang all the time.
Cunt doesn't bother me, myself, but because it's so offensive to so many women I almost never use it and often wince when other people use it.
Pussy doesn't bother me in the right contexts, but I do hate certain uses -- eg,
I'm going out to get some pussy. -- but that's more about the objectification and low standard, I think.
It took me years to get used to
cum, probably because as a kid I read older erotica that still used the older
come (or
come off), which I believe was already in use in Shakespeare's day. If memory serves, the newer spelling didn't arise until the 1930s and didn't become popular until the 1970s. But eventually I got used to the new spelling, for better or worse.
I stumbled over
acheewawa-george.

This is basically in the same vein as
Ay, chihuahua!, yes?
I say "pee". I didn't think that was a baby word.
Pee is not my favorite, but I think of it as a juvenile word, not baby-talk, which would be
pee-pee, which I do hate.
Piss seems vulgar (though OK in some contexts) to me. Frankly, I think I'm more likely to say
whiz or use some elaborate self-amused euphemism (eg,
Praise the porcelain or
Pour the meat amphora.)