Rosie has a diagram.
"You see this is the sperm that is always being born in the man and this is the egg that is in the lady, and the sperm has to find the egg before it gets too old and ends up just wandering around the body."
"You see this is the sperm that is always being born in the man and this is the egg that is in the lady, and the sperm has to find the egg before it gets too old and ends up just wandering around the body."