I'm well used to PSHE days now having been through a full year's cycle of them with a year seven form. I'm repeating them this year with my very own form. The older years were doing about sex-related things, but as you would imagine year sevens concentrate on more innocent things like designing and marketing a sweet.
This doesn't mean the day is free from innuendo. One group came up with an idea for a chocolate bar that's 'like an explosion in your mouth'. I doubt I'd have picked up on it if another group hadn't decided on the name 'Hucker bar'. Which I'm sure is the name of somewhere in Amsterdam.
I couldn't talk to a class full of kids about sex mate, big up to you for that! I'd be embarrassed as fuck!