Lena Dunham says Jon Bernthal should teach on 'how to be a man in a sex scene'

Actress Lena Dunham thinks co-star Jon Bernthal should give lessons on "how to be a man in a sex scene."

The 36-year-old actress also praised 45-year-old Bernthal for his "thoughtfulness" when directing him during intimate shoots for her newest film 'Sharp Stick', which tells of a naive young woman, played by Kristine Froseth, 26, who begins an affair with an older employer, reports aceshowbiz.com.

"I have to give credit to Jon Bernthal - I always joke that he should give a class on how to be a man in a sex scene," Lena told the new issue of W Magazine. "He is so gentle and so thoughtful, he could literally have a side hustle as an intimacy coordinator."

Dunham, who is married to 36-year-old musician Luis Felber, said she was determined to "create an environment that allowed people to talk about sexuality that was actually safe."

"I feel like there's always been this anxiety I've had with directing men, this fear that I wouldn't be strong enough or tough enough or show them what a boss I was," she added.

Dunham made her directorial debut in 2010 with the indie drama 'Tiny Furniture', followed by six seasons of comedy series 'Girls', which earned her eight Emmy nominations.