Pussy...now there's a "how long is a piece of string question". I love going down on my girls and they all taste different. There's the metallic sort of taste to a frankly horrible OMG I'm not doing THAT again taste. Neither of those are particularly pleasant. Most often it's a kind of very slightly...oh who the fcuk am I kidding...I can't describe what a good one tastes like, it's just gooooooooood.
Cum? Well, just cos I was curious I tasted my own, just once. Can't say it tasted of anything at all really.
I can't speak from experience about the middle one and have no real interest in finding out.
Handy tip here boys, if you're worried about what she's gonna taste like, just play with her pussy for a while then say you've an itchy nose and go to scratch it with the same hand. While it's up there, have a wee sniff. If it smells bad, and I mean BAD, don't do it. If it smells ok go for it. Normally I get a whiff and I'm off...she's not gonna see my face for a good 5-10 minutes, hehehe