Erotic Massage -
A man goes to a Spa for a much needed massage to help him relax. The Masseuse is a petite but quite attractive young woman so he decides to go naked for the first time. Normally he wears his underpants. The two flirt a little and then she starts teasing him during the massage...letting herself brush against him....causing an erection to form by the time he rolls onto his back. She can't help herself and asks if he wants a hand with that - the goal is to 'relax' - and things quickly go from there.
School Girl Crush - http://th07.deviantart.net/fs71/PRE/f/2012/045/c/d/romi_and_juli___sexy_schoolgirls_by_martindna-d4pql4n.jpg
An idea that was started but partners disappeared. School Girl A is popular, the girl every girl wants to aspire to be, and pretty. She knows she is as well and is quite confidant. School Girl B is the opposite, hides under her clothes, and is shy, but always follows around SGA. SGB is pretty but no one would know it. Other then SGA. SGA and SGB are roommates and lovers though the latter is a secret.
Male Teacher is an erotic novelist, publishing stories on Literotica, all schoolgirl themed. He has written several short stories and one girl keeps appearing in it - a girl based on SGA. SGA reads such things and has finally pieced it together. Since there is almost no cock at the All Girls School, she decides to use her knowledge to seduce her Professor. Besides, SGB has never seen a cock before and needs an education in that!
-Looking for SGA (School Girl A) and SGB. A is more confidant and seductive, B is more submissive. Once the Male Teacher is 'seduced', though, both girls can become submissive to him.