According to a previous answer, the Wife of Bath and the Queen say that women want control.
I really have no idea about a proper answer to this question, and after reading commentaries about it, I think that maybe even experts do not agree. However, since no one else has tried to answer it, I'll offer my two shekels.
The simple answer might be that Alison, aka Wife of Bath, believes that if I act like a wanton slut with my bele chose, aka sexual favors, in husband's bed; he will become my debtour and my thral, aka my debtor and slave.
I don't know if the king and queen would agree, but I have a sense that my mother would.