Instinct!

U: Hey, Why are you looking so depressed?
Me: Hmm... Whenever... a good looking girl in front of me waves her hands "at me", I always have this strange instinct to look behind and... unfortunately I always find a boy there :(

Stuck!

U: Hey, Can you please tell me how you got this result ?
Me: Hmm... Hmm... Hmm... may be... I ll leave it as an exercise!