The sexologist lends me his cock for my private lessons.

My parents are scandalized when i ask them anything about sex and they decide to send me to a sexologist's office so that i can explain everything so they don't have to. when we start with the practical classes to put a condom on, the sexologist comes up with a better idea for him to learn. he ends up taking his cock out and giving me a condom to practice and put it on. how nervous it makes me to have a real cock in my hands but how rich it is inside my mouth.