It's definitely a turn-on knowing your partners fantasies. To me it would be a turn-on just Knowing my partner wants to know them. I would make a little game about it, not super-serious, that might make her nervous and not want to share. The you tell me one, I'll tell you one sounds nice. Or, start a bedroom conversation like..."have you ever...thought this or done this..." I just think women love knowing their guy is sharing deep thoughts. You know, women love all that drippy 'emotional' stuff, *
