Best friends.

Sisters who look nothing alike.

A mother who’s miraculously the same age as her daughter.

Europeans air-kissing but on the mouth.

Two people having a very slow arm-wrestling competition.

Out-of-uniform police partners.

Girl Bert and Ernie.

Jehovah’s Witnesses who are lost.

Female C.E.O.s who leaned in just a little too far.

Cousins who haven’t seen each other since their grandmother’s funeral.

Brangelina.

Someone speaking to herself in a mirror.

Nurses on their lunch break at 8 P.M.

Exceptionally close managers of a Pret a Manger.

Two-sixteenths of an a-cappella group.

Actors in a play about a couple dating for real.

Tina Fey and Amy Poehler.

Amy Poehler and Maya Rudolph.

Drunk women in a bathroom who aren’t drunk or in a bathroom.

Running mates.

Escaped nuns.

Austria-Hungary?

Alsace-Lorraine?

The Wicked Witches of the East and the West.

Reunited triplets, but one of them died.

Strangers who touch.

Synchronized swimmers.

Two sentient Chia Pets.

Zombie friends.

Two people in the front and back of a horse costume who lost the horse costume years ago.

The Easter Island heads, if they were grabbing some tapas together.

Seagulls fighting over a French fry.

And one more time, even though they already asked: Sisters?