General

I used to use a scissors when I was younger and just cut it, because it didn't grow much. When I first shaved the week after it started growing alot faster and a little thicker.

Eh, it won't. It's not like you're putting some special facial cream to make it grow thicker, right?

How fast and how thick your mustache grows depends entirely on genes.

No for a fact.

I don't know about a mustache but when I shave my legs in the summer, when the hair grows back, each hair strands are thicker than if I would pluck out the hairs one at a time. Same amount, just each strand is thicker.

No, it doesn't.
Hairs themselves just look thicker.
You won't get any more of the follicles themselves, IIRC.

No, it will not. People say it will grow back thicker because of the way the ends of the hair looks after it's been cut.

Or at leas, that's what I've heard.

If you shave your pubes, your mustache will grow however long you want baby!