Sex tutoring - instead of maths there were hard biology less

Maths can be so boring and honestly, why do you need it at all? I don't know anyone who will have to work out any equations later in life... so I tried to persuade the tutor that we should learn something else. I was able to get him interested in biology and when I put my body at his disposal, we were immediately away from maths :) He really liked biology on a living object and so did I. He fucked me hard and stretched my pussy wide open with his hard cock... We fucked in different positions and in the end I had to suck the cum out of his cock. He held my head with his hand and pushed his cock deep down my throat. It was really borderline, but I was very brave :) He squirted out a good load of cum, which I licked up well!!!