gon:
Your first kiss happened when you both were at the blimp.

Killua:
Yours happened when you both were eating chocolates and killua saw that you had some on your lips. 

BOOM

And the kiss happened.

Kurapika:
He did it before going on a dangerous mission

Hisoka:
It was more like a hot make-out session, to be honest 😒

Illumi:
It would be him puling you, and smashing lips with you.

Of course he did it with his usual terminator face.

Chrollo:
He kisses you when you are on your break. He kisses you sometimes but your always busy.

---------------------------------
Yo!  Took some prescription drugs.
And guess what?

Keep guessing.

Got your answer?

No second chances .

OK.  I became sick asf right now. 😒