I'm not allowed to use any of the 3 around my wife, with **** being the worst. She has no problem using the word, usually in reference to women that piss her off. The terms that I am allowed to use are cooche and pooswaa, I don't know if the last is spelled right. My teenage daughters have zeroed in on the term "slut junk" as in "if that skank doesn't back off I'm going to punch her in her slut junk" P.S. I did use the term night deposit box at the sperm bank once, those were a couple of cold days in Florida
twat is used to much in england to be offensive....snatch is one i used when i was 15....****/...i love that word however...when directly addressing my lady friends about there vaginas i will usually use //cha cha''....as in....'can i please see your cha cha'
least offensive is snatch. I might call say **** during sex such as 'wow you've got a nice ****' but it's not very likely unless she'd started saying it first and then I don't think i would. I'd never say twat though. I just stick to my fav. good old pussy or hole's nice. My fav phrase though is 'inbetween your legs'. I just love saying that as i'm about to fuck someon.
For what it's worth, I find a woman using hard consonants about sex incredibly erotic. In other words, "Fuck my **** with your cock," is considerably more erotic than "slide your willie into my pussy." But let's make no mistake... I'd still get turned on by, "I wish to have your penis caress my vagina."