WishVideo Biology with Karsten

Karsten has the idea that he should give me biology lessons. He has sent me a picture of his cock as a visual object. Of course I describe what I see there. His cock is long and thin when it's flaccid, it doesn't get any longer when he's aroused, so you can already guess how the lesson will develop. I'm only too happy to invite you to wank for me with my nude, horny facts. I like a lot of cum on my body and so the theory lesson turns into a practice lesson on how Karsten best wanks and jerks off for me. Are you with me?