Washington, Jan 30 : John Mayer might just have to get a wax, for there's one thing girlfriend Jennifer Aniston wouldn't want in her man - his "back hair".

In an interview for her new film, `He''s Just Not that Into You', the actress said that hair on the back is a big no-no for her in a relationship.

"I got to say, that's a deal-breaker. The occasional rogue hair, I can easily help that one out," Fox News quoted her as saying.

Another pre-requisite for the `Friends' star is that a guy should have a sense of humour.

In fact, for her, being funny scores over good looks too.

"Oh God, can you have a funny guy you are not attracted to? Basically, it's chemistry, chemistry, chemistry," she said. (ANI)