yelp!

i don't understand the saying "head over heels"

i understand what it means and how to use it in conversation but . . . aren't our heads ALWAYS over our heels?

can somebody prease yelp me!?

EDIT:

i did some research and found the following

'Head over heels' is a good example of how language can communicate meaning even when it makes no literal sense. After all, our head is normally over our heels. The phrase originated in the 14th century as 'heels over head', meaning doing a cartwheel or somersault.

we did it guys