Kendall Jenner reveals details about her first kiss

The 20-year-old model has revealed she stepped into the bathroom to kiss her boyfriend.

Kendall Jenner. Picture: AFP.

LOS ANGELES - Kendall Jenner has revealed she had her first kiss in the shower because her younger sister Kylie Jenner was "trying to spy" on her.

She said, "You're going to think this sounds really crazy, but it's not as crazy as it sounds. It was in a shower, but not on. We were fully clothed playing truth or dare and it was me and three of my friends.

"And my little sister was trying to spy on us. My room didn't have a lock on it, but the bathroom door did so we all shoved in the bathroom until when we got dared to kiss someone. We would have to go in the shower and like close the curtain so no one would see and we'd kiss and come out. So it was in a shower, but it wasn't as naughty as it sounds."

And the Keeping Up With The Kardashians star also revealed she used to have a crush on Justin Bieber but insists she is past that now.

She told W magazine, "I was more into the Disney kids. Like, I think I had a crush on Zack and Cody (Dylan and Cole Sprouse) from Suite Life of Zack and Cody.

"Justin Bieber was like the pop star of my time. I feel like I must have had a 12-year-old crush on him. Not anymore though!"

Meanwhile, Kendall previously admitted she is "old-fashioned" when it comes to dating.

She explained, "It's not that I'm scared of asking a guy out or showing him that I like him, it's just that I'd much rather be pursued. I definitely like the chase and the feeling of being wanted. And, the way I see it, if a guy isn't going to put in the effort and ask me out, then the relationship probably won't work. It would be a waste of time for me. Call me a little old-fashioned, but it's just what I like!"