Miley Cyrus' current sex life with new boyfriend Patrick Schwarzenegger has been revealed -- why is it better than sex with ex-fiancé Liam Hemsworth?

Cyrus and Schwarzenegger, who have been showing off excessive PDA lately, apparently not only enjoy each other on dates but also in bed.

"Miley is in lust with Patrick," a source told HollywoodLife.com. "When they aren't partying they're in bed, she's having more sex than she's had in year and she says it's by far the best sex she's ever had."

The pop star reportedly likes the fact that the son of Arnold Schwarzenegger is more aggressive than how the "The Hunger Games" actor was, in terms of sex.

"She says Patrick has a higher sex drive than Liam Hemsworth," the source continued. "With Liam, she felt like she always had to initiate sex, but with Patrick it's the opposite, he's ready for it even more than she is, to the point where she has to get him to stop because it's too much for her body to take. They had so much sex on their trip, when she got back she needed two days to recover."

According to the source, Cyrus "can't believe his stamina."

"He just doesn't stop," the source said. "He's clean-cut on the outside but so naughty behind closed doors."

According to Life & Style magazine, the new couple first hooked up back in 2011, when Cyrus was on a break from Hemsworth. Ever since then, Schwarzenegger has been calling Cyrus his "dream girl."

The "Wrecking Ball" singer apparently feels the same way about her new beau, even considering having a child with the man whose great uncle was John F. Kennedy.

"Miley's commented on how she and Patrick would make the cutest kids," a source claimed. "She loves Patrick -- and she loves the idea of having a Kennedy baby!"

Similarly, an insider previously insisted that Cyrus is happier than ever, now that she is in a relationship with Schwarzenegger.

"I have seen Miley with Liam and other boyfriends but honestly, I have never seen her look as loved up as this," a source told E! "This is more than just a fling, they look like they are falling in love with one another."

Related