What does it mean when a guy looks at you and then looks away with a smile on his face?

[PuffinPoo07]

I keep seeing this guy and a few times recently he’s glanced at me and then quickly looked away, with a smirk/smile on his face. He also started whistling to himself when he looked away.

[EmmaMary]

It's pretty obvious that he wants to give you a damn good fucking... Simples!

[PuffinPoo07]

Oh my, the thought of that hehe

[EmmaMary]

Well what are you waiting for? Go for it! lol

[EmmaMary]

Thank you so very much indeed for the SO.

[strateguy632]

He was surprised by your hair style

[justabuddy]

He thinks you are attractive

[In_Trance]

It means he's farting silently