On the female anatomy?

So a friend and I have an ongoing heated debate over something, and he won't allow testimony of any women I know as he thinks they'd take my side to spite him. So question is, is it true that when properly stimulated and aroused, the lips of a womans vagina will flush with blood and "plump"?

Thank you, and while men are welcome to voice their two cents about this, their testimony will likely not be allowed in this court.

Damn, I was going to add a poll to make this easier, but I'm 101 experience points away from that.
On the female anatomy?
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