"Second Life is an immersive learning environment where you log in, you have an avatar, and you can travel around and do all sorts of interesting things. If you're interested in that sort of thing, you're welcome to go to Second Life and download the program onto your computer. If you go in and search for "[REDACTED]Medicine," you'll find a bunch of stuff that I built in Second Life. I don't use it that much anymore. But, there's a giant model of the testis that you can get on a little sperm car and fly inside the testis, fly inside the seminiferous tubule, see how sperm is produced inside the tubule... There's also a big model of the ovary. Not anything you need to do but if you're bored some night and you need some entertainment... You can go in with your friends! There's room on the Sperm Car for four people. So you can have four avatars on the car and fly through the testis at the same time, talk to each other, point out interesting facts and features of the seminiferous tubule."
Male reproductive physiology lecture.