>

Well, they are also contemporaries. Seymour is 39 and Ardern is 42, and NZ politics is small, so they both have been around each other for a long time. 
Also, Seymour loves being a prick. It is kinda his thing. Both Ardern and Seymore saw their stock rise with this situation.
But in a positive twist, her inadvertently public jibe in the parliament Hansard has ended up raising NZ$100,100 ($93,733) for a prostate cancer charity.
"I want to thank everyone for coming together over a good cause and having a bit of fun this Christmas to help pricks everywhere." >

Note that the quote stated is by the opposition “prick” haha >

Only in New Zealand can an insult be turned into charity >

And it was even the idea of the guy that Ms Ardern insulted. That's honestly a pretty classy move right there. "You insulted me! In retaliation, let's do this thing for charity!"