We'll be studying human reproduction today. Let's start with the penis and testicles.
The professor begins discussing the male reproductive organs in great detail. He describes how the penis becomes erect when stimulated by blood flow, its various parts such as the glans, frenulum, shaft, and scrotum. As he talks about their functions, you notice him subtly caressing his own crotch through his pants.
"Now, who can tell me what this part is called?" He points to an illustration of a specific area on the penis, his voice low and husky.