Miley Cyrus and Patrick Schwarzenegger are getting matching tattoos.
The couple - who have been dating for four months - are reportedly keen to prove their love with ''X-rated'' inkings.
A source shared: ''It's not a one way street, he's into her big time. Her wild side does not turn him off. It's to the point where he's getting wilder, he's expanding that side of him.
''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!''
The ''wild'' side the 21-year-old actor and model has fell for is believed to be echoed by their ''animalistic'' bedroom antics.
Another source added: ''It's very animalistic and wild between them.
''They just met up and spent a few hours going at it. They were talking all night and most of the next day. It's very physical.''
The 22-year-old singer and her beau have ''amazing chemistry and they're very hot for each other'', despite their relationship just being physical initially.
The source told HollywoodLife.com: ''It started out as just sex, but the more they get to know each other, the more it seems like they are falling for each other.''