For many actors, filming intimate scenes alongside a co-star is something viewed as excruciatingly awkward.For Aubrey Plaza, however, who was required to film a series of sexy moments alongside Dirty Grandpa cast-mate Robert De Niro in 2016, the opposite couldn’t have been truer.The pair were cast alongside the likes of Zoey Deutch, Julianne Hough and David Kelly in the X-rated comedy.In it, Hollywood legend De Niro plays Zac Efron’s recently-widowed yet heavily-horny grandfather, Dick, who sets out for one final spring break blow-out following the death of his wife. During his endeavour, Dick tricks his grandson’s considerably-younger, sex-obsessed university student gal pal, Lenore (played by Plaza), to sleep with him.

Whilst promoting the X-rated laugher-fest a decade ago, 41-year-old Plaza recalled filming some saucy scenes alongside De Niro.Speaking to Jimmy Kimmel that year, the Parks and Recreation favourite claimed: “There was a lot of interesting stuff that went down, you know.”Plaza went on to detail a ’10-hour’ sex shoot, during which she recalled she and De Niro, 82, receiving a number of cues from both directors and intimacy coordinators, none of which, she confessed, sank in.I’d try to get in there and suck on his nipples,” Plaza laughed. “And he was like batting me away, and I didn’t know if it was in character or not.”She was later informed by staff on the set that ‘Bob does not like his nipple area paid attention to’.Recalling her reply, Plaza joked: “Great, now he thinks that I wanted to do that.”