Miley Cyrus and Liam Hemsworth: Starlet Brags about Kissing, Straddling Costar Josh Bowman as the 'Best Job Ever,' Not Ready for Marriage?

Things seem to be going quite well for the young Hollywood engaged couple, Miley Cyrus and Liam Hemsworth - but is the former "Hannah Montana" starlet truly ready for marriage? The songstress is not even of the legal drinking age yet (she just turned 20 in November), and it appears that she currently enjoys basking in her young and wild ways (just check out pics from her recent performance at Borgore's "Christmas Creampies" concert in L.A.). Partying and living a fast-paced lifestyle is one thing, but the fact that Cyrus recently bragged about making out with and sitting on her "So Undercover" costar Josh Bowman have some gossip tabloids spreading rumors about cheating (especially considering the starlet described the experience as the "best job ever"). What do Mstarz fans think - is Cyrus just having some innocent fun, or is she truly not ready/mature enough to officially tie the knot with her "Hunger Games" sweetheart?

According to a report in the Sun, Cyrus apparently had a pretty good time getting her "sexy" on with fellow costar, 24-year-old Bowman (the adorable English actor known for his role as Daniel Grayson on ABC's "Revenge"). Both star in the upcoming U.K. action-comedy film "So Undercover" (to be released in the U.S. direct-to-video on February 5, 2013). And the teen starlet couldn't help but to brag about her locking lips and straddling Bowman for the camera:

"He's so cute. I had this scene where I had to tell him, 'Your balls are amazing,' and I got so awkward doing it," Cyrus explains. "I also had to kiss him in our first scene together. It was fabulous. Making money to kiss Josh? Hello, best job ever. The next day I was handcuffing him to a radiator and sitting on him."

Apparently Hemsworth should have nothing to worry about - Cyrus insists that it's all just for film and television (she basically had the same reaction after having to kiss Angus T. Jones on the set of "Two and a Half Men"):

"It's not really romantic. Especially when the crew yell, 'Hold it longer, tongue her!' as you kiss."

Even so, is Cyrus a little too over-amped about sharing such intimate scenes with men who are not her future hubby?

Rumors of Cyrus and Hemsworth's "inevitable" breakup have been swirling ever since the couple announced their engagement - but the duo has remained strong throughout it all (even after Cyrus' radical fashion transformation and Hemsworth's annoyance over her rather personal Twitter posts). But is Cyrus pushing the limits with her on-and-off screen flirtations? What do Mstarz fans think?

Cyrus insists that she isn't in a rush to get to the alter anytime soon - taking things slow might be the best thing for the young couple right now. 

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