Brody Jenner has managed to get all inappropriate again, this time by saying that his half sisters Kendall and Kylie Jenner know more about sex than him.

Yep, one of them is actually underage as well.

Chatting to the Mirror ahead of his new show Sex With Brody, the reality star said that they aren't so innocent.

“Do you seriously think they don't know what's up? They could teach me things!” he said.

Adding: “I mean, look at their older sisters. Are you kidding me?”

He'd even be happy for them if they wanted to have their own show all about sex. Because that's normal.

“If that's what they wanted to do I'd congratulate them - especially if they did what I did and put an entire project together from beginning to end.”

Just stop talking, Brody.