Thanks, I got them from a unicorn
"I like your boots" is code in the LGBT community for, "I think your hot, are you gay too?". The appropriate response (if the answer to the question I "yes") is "Thanks, I got them from a unicorn". This is based off a line from the movie Love, Simon, in which a character says "I like your shoelaces" and another responds with "Thanks, I got them from the President".
"Hey, how you doin? I like your boots."
"Really? Thanks, I got them from a unicorn."
"Really? Thanks, I got them from a unicorn."