Fitting carb on opposite side

Whilst I've got my engine out, I was wondering why some carbs fit on the kick side? Is it for ease of fitment and is it as easy as just turning the manifold?
I expect a few eye brow raises, but I thought I'd ask, despite my lack of general.
Cheers
I expect a few eye brow raises, but I thought I'd ask, despite my lack of general.

Cheers