The America actress and model spoke about it on Wednesday night appearance on Chelsea Handler show. She also explained that why marriage is not for her even if she is not anti-marriage.

“I’m not like anti-marriage or the institution, like for other people,” Mendes told host Chelsea Handler. “And I love the idea of a union that’s all very beautiful. But it’s a very old fashioned, archaic thing.”

“I actually think it’s really sexy to be with someone in your fifties and sixties and be like, ‘That’s my boyfriend,'” Mendes added. “I think husband and wife is just very unsexy.”

The 37-year-old actress has dated for long with Peruvian director George Augusto, but never married him. “Well no, because, it’s not personal, it’s just the institution… Why?

If you love someone and you have a spiritual union, I just personally don’t think [I need] a piece of paper because society tells me [is necessary],” she said.