The Prime Minister is being challenged to speak up as he faces questions in Parliament later today over ponytail pulling.

The John Key has faced attacks in recent weeks after a waitress at a cafe he frequents published an account of Key constantly pulling her hair without consent.

Key apologised, but said he was simply "horsing around".

Labour Leader Andrew Little thinks John Key should front up and is accusing him of not maintaining the dignity of his office.

"It's for him now to demonstrate that he can conduct himself with dignity, and with a level of responsibility and accountability that that office demands."

Key maintains he won't be making any statements in Parliament on the matter.

"I think if you look at my comments I've made, every comment that I can make, I've traversed the issue, I've been extremely sincere in what I' ve said."

"It is what it is now, people judge me on that."