What does the labium on a grasshopper do?

Grasshoppers lay eggs, so technically their Labia/Labium would be the orifice on their underside that the eggs come out of.

It assists manipulation of the food during mastication. That would be their Mandibles, Pincers, mouth parts etc.. I believe the term labium is in reference to their reproductive system.

no of course not it's made of like, chocolate filling, or at least that's how my mom makes it..... but I'm sure in Africa or else where they do.....just a thought. Not that you couldn't add them...

Usually not since grasshoppers are vegetarians. But, if a grasshopper is smaller than a grasshopper he might chose to eat him.

If you go into a field you don't find one grasshopper you find none or thousand's! so for their habits I think that would be a yes.