now there are only the four of you: you, Jotaro, Kakyoin and Polnareff. You're waiting for Joseph and Avdol.

And while you're standing there doing nothing, suddenly Polnareff says to Jotaro

"Hmm... I wonder what color Kakyoin's eyelashes are? I bet they're black!"

to which Jotaro says

“I bet they’re red.”

Poor Kakyoin stands there and doesn’t let them approach him, he doesn’t want to be someone’s money bet. Now two idiots asking you to find out the color of Kakyoin’s eyelashes