Raised by ponies didn't bring anything up, but this and this did. ?!

COLIN: SO, UNICORNS.
BRADLEY: SHUT UP, COLIN.
COLIN: NO, IT'S COOL. I MEAN, PONIES, WHATEVER. BUT UNICORNS...
BRADLEY: REALLY???
COLIN: . . .
COLIN: NO. UNICORNS ARE IMAGINARY. ALSO, I STILL HAVE TO FINISH THIS HOMEWORK.
BRADLEY: D: