Perhaps Ryan Reynolds should explain the origin of male nipples to his wife Scarlett Johansson. The actress has revealed that she is both fascinated and baffled by men’s nips.

The He’s Just Not That Into You actress says she can’t understand why boys still have them.

“The one thing I don’t understand about men is nipples. I don’t know if there is one aspect of men that I don’t understand other than why they have nipples,” Scarlett told The Chicago Sun Times.

“Honestly, why? I guess it has something to do with the X chromosome. What is the function of the male nipple? Maybe we all start as androgynous creatures and then they become men?”