Taking a frank look at the world of sex, the roadshow hits Stockport School near Manchester, where pupils try looking after a toddler for the day and get a lesson in how and why people come in so many different shapes and sizes.
From hormones to genetics and breast size to penis length, the students get a frank and full frontal lesson in why we're made the way we are.
The pupils go on a field trip with a difference and discover that bringing up baby can be hugely challenging as they experience the harsh realities of looking after a toddler for the day.
Viewers also meet a person of restricted growth, 22-year-old Ivy Broadhead. She reveals how, when it comes to sex and height, size really doesn't matter.
Plus the final set of results are released from the Great British Sex Survey and reveal how age affects what you like doing, with whom, where, and how often.
