"Please Explain" is a quote Australian senator Pauline Hanson. It has become a well-known in-joke in Australia.

Origin
Pauline Hanson is an Australian senator and leader of the right-wing One Nation party. The party has occassionally been involved in some controversy due to alleged racism. The quote first appeared in an interview on news show 60 Minutes. Pauline Hanson was asked by the interviewer, "Are you a xenophobic?" to which she replied, "Please Explain?"

Use
The meme is considered to be an Australian inside joke and one of the country's earliest memes. It is generally used as a caption for images of Pauline Hanson. The meme's spread can be attributed to the controversy sometimes caused by Pauline Hanson for alleged racism.

A documentary titled "Pauline Hanson: Please Explain" was made in 2016 and details Pauline's life.

"Pauline Pantsdown", a satirical character created by comedian Simon Hunt to parody Pauline Hanson, has also occassionally said the quote.