Please and Thank You

Please and Thank You, in my estimation 
Are essential pillars of civilization 

When I ask for something and I say please 
Metaphorically speaking I'm on bended knees 

When my wish is granted, it's my contention 
That a word of thanks is the right convention 

Not everyone, I suspect 
Sees this ritual as a mark of respect 

So if you have lemons you'd like me to squeeze 
I'll do it with pleasure if you'll only say please 

But if, when I do, you forget to say thank you 
I'll put you over my knee and spank you