One question about spit

[hurly]

Why exactly do we humans and certain animals spit...?
It does require energy to re-produce the spit, so is it a good thing to spit?

[James]

To expel excess saliva and mucus.

[b_d_41501]

I think if you look at the grand-scale of energy production the loss of energy isn't all that much

[mith]

Maybe there's stuff like bacteria or dust in the mucus.

[Dr.Stein]

From immunological view, it can be defined as a natural behavior to reject foreign substances that enter our body through digestive systems in order to anticipate the possibilities of pathogenic substances to invade within our body. Also, it is a way to reject something unfamiliar to our body that ours don't recognize them yet.

[victor]

It's already programmed for us to spit if there're strange things come inside..

[b_d_41501]

Yeah, it's instinct to start spitting when you get something like hairs in your mouth.

[James]

Llamas also spit for social reasons.

[b_d_41501]

As do I. lol. Some men do this as a sign of masculinity as well. I notice it outside of funerals and such.

[Poison]

I can't say that I like guys spitting around outside.

[Zachthemac]

Camelids (camels, llamas, alpacas, etc) spit out of frustration, defense or around food.

[b_d_41501]

Yeah, this isn't a generally attractive thing for the ladies Poison. lol. I don't spit, I think it's disgusting to do it unless i've got hair in my mouth or something else like dust, etc.