[Sillaycheg]

Is nothing unless he was giving her mouth to mouth

Kidding

Flirting can mean a lot of things:“to court triflingly or act amorously without serious intentions”
Meaning it’s just play with no actual consequences

And I agree with what everyone here said …it’s none of your business…besides you can’t know the actual circumstances….
Flirting is essential for guys (and girls)… it reminds them of the one essential point in life.
A bird in the hand is worth two in the bush
if this is the proper English expression and is not something to be posted on the internet