Paris Hilton started the week off with an existential crisis. On Sunday, she tweeted the conversation starter, "What's on your mind?" accompanied by a very philosophical-looking black-and-white photo.

What's on your mind? pic.twitter.com/coinxJfDXP
— Paris Hilton (@ParisHilton) September 10, 2017

Fans started answering immediately, and over 2,000 responses are turning her basic question into a philosophical discussion.

Some attempted jokes:

my money https://t.co/uKj07FkDOP
— Howlin' Mad アダム (@TwoBitWhackJob) September 11, 2017

What's another word for "thesaurus?"
— Esther Ciammachilli (@EE_Chilli) September 11, 2017

Some got personal:

With all this wet weather, are there going to be spiders in the house EVERY night? https://t.co/FxF3fuhoKm
— Maggie Doyle (@TheMaggieDoyle) September 11, 2017

Some got philosophical:

What's the sound of one lip chapping? https://t.co/yFkVoQt8WF
— BLTP (@Gargarin) September 11, 2017

Is vanilla ice cream a flavor in its own right...or is it just the lack of any other flavors? https://t.co/KYqPRskjwZ
— RJBIII (@RolandB3) September 11, 2017

What do animals think cars are? https://t.co/yyf564VYAC
— David Whitley (@mrdavidwhitley) September 11, 2017

Some got political:

Is whatever Steve Bannon has contagious?
— Donald J. Trump (@niceDonaIdTrump) September 11, 2017

Some made a wish:

I hope this combo headache and bout of sniffles doesn't turn into a full-blown cold. https://t.co/rNiw9W9n6L
— Paul McGee (@Paul_McGee) September 11, 2017

And some quoted the Baja Men.

Who let the dogs out? https://t.co/kQP0TvzgoP
— Joey Powell (@Joey_Powell) September 11, 2017

Despite all the conversation she started, Hilton continued right along with her social media as scheduled.

Chilling at home in #NYC in my @JuicyCouture. 💕🌈👱🏼‍♀️🌈💕 pic.twitter.com/utoTPFvRjD
— Paris Hilton (@ParisHilton) September 10, 2017

Unfortunately, it looks like we'll never know who Paris Hilton thinks let the dogs out.

Twitter is getting existential thanks to Paris Hilton, of all people.