How big is a normal penis? What does an uncircumcised penis look like? Can you have too many erections? In this episode we learn that penises come in various lengths, colours, curvatures and thicknesses - and all of this is normal. They list words people often use instead of penis, and the reasons they are used. There's some testicles talk too as the kids conquer Scrotum Ball, and they learn how the testicles and scrotum function. Our special guest is a doctor who has seen a lot of penises. The teens create a penis glossary and talk about circumcision.