Talk about a little TMI here. Actually, make that a lot. Apparently, Justin Bieber and Kourtney Kardashian are not only dating, but apparently enjoying quite the sex life together, too. There's even a new rumor that says Kardashian has been telling all of her friends that Bieber has been the best lover she's ever had.

According to Star Magazine (via Hollywood Life) on Wednesday, Kardashian is supposedly telling her inner circle of friends that the chemistry she has with her new boy toy is so amazing that she and Bieber might consider going public with their relationship soon. So far, the couple has managed to keep things on the down low even though they've been rumored to be hooking up for months now.

One source told the tabloid: "There's definitely an age gap there, but they have a lot of chemistry. Despite Kourt being 15 years older than him, there's apparently a very sexy reason for her to get back with Biebs. She thinks he's the best love in the world."

If that weren't enough, Bieber supposedly makes Kardashian feel "young" again thanks to bootycalls that last till 4 a.m. in the morning.

The insider added, "Being around Justin makes Kourtney feel young. It's refreshing when she spends all day chasing after a bunch of rambunctious kids."

And while they've been photographed together by the paparazzi on several occasions, they are still being careful "not to flaunt their fling." Yet, Kardashian can't help but compare Bieber to her ex Scott Disick. She told pals that, "Justin is great with her kids, certainly more playful and fun with them than Scott ever was."

Keep up with Enstars for all the latest news on Kourtney Kardashian, Justin Bieber and all of your favorite celebrity couples right here.

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Kourtney kardashian, Justin Bieber