Teach me

My fantasies lately have been gravitating towards a situation where I am having sex with an MF couple, when the woman asks me if I want to learn how to suck cock. Together we give her partner a blowjob as she instructs me in how to please him, alternately demonstrating while I watch, and watching while I practice.

Alternately, I'm the lucky training cock as she teaches her partner how to please a man with his mouth.