'Head or tail?' vs 'Heads or tails?'

[Tom]

Hi

I just heard someone saying while he was flipping a coin,

'Heads or tails?'

Is it correct? If yes, why? Why not 'Head or tail?' ?

Tom

[Yankee]

Hi Tom

When you flip a coin, the plural forms (heads/tails) are used. I don't know why. It would sound very strange to me to hear the singular forms used in this context.

But there is also the idiom "can't make head (n)or tail of something" which means not able to understand something at all.

Amy

[Tamara]

Hi

It’s just the name of the game, what logic are you expecting, Tom?

[Conchita]

Another expression you can use before you spin the coin is 'we'll toss for it'.