I like B. (I don't know why, her role is so small, what a pity, Perrin is just a plaything to her but I think she's in love with Rand, see LoC) but this "confession" always bothered me.
The other two were politics.
We know that the very concept of prostitution is totally unknown in Randland (or not?), so I really don't understand this sentence. Or did she just say, "Don't worry, I'm not a virgin"? (Riding - No, you cannot. Your virginity is lost the first time that you have sexual intercourse for both sexes, and for females, not when the hymen is broken.)