Miley Cyrus and current boyfriend Patrick Schwarzenegger have reportedly been filming their sex life for pleasure.

"Miley has mentioned that their sex life has consisted of filming and taking pictures but they instantly are erasing it after watching and looking at it," a source revealed to HollywoodLife.com. "Plus Miley likes using candy, like lollipops. You can imagine how that goes."

Also, Cyrus and Schwarzenegger, who have frequently been showing off excessive PDA, reportedly want to get matching X-rated tattoos together -- especially with the latter being influenced by the former's wild side.

"He's actually gone so far as to tell her that he wants them to get matching tattoos, below the belt, if you know what I mean. It's so X-rated and of course she's totally down for it!" another source claimed. "They are still talking about designs and when it happens it'll be a spur of the moment thing but it's a big sign that he's not as straight edge as he might seem and that he's serious about her."

The publication previously reported that Patrick Schwarzenegger has a "higher sex drive" than Miley Cyrus' ex-fiancé Liam Hemsworth.

"Miley is in lust with Patrick," a source said. "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 apparently 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 added. "He's clean-cut on the outside but so naughty behind closed doors."