Yes, you could get dirt in them if you don't.
okay, if you are using a normal bike short or jeans {jeans you don't minded getting dirty} and a tshirt. if you use a racing dirt bike padding gloves helmets and and some goggles to keep dirt out of your eyes
Yes, biking goggles can be designed to fit over glasses for individuals who wear prescription eyewear.
Moto goggles are single lens, ski goggles are double lens. The double lens reduces fogging, which is nice on the slopes and why ski goggles are more expensive. Also, good ski goggles come with UV protection, but some moto goggles do not.
yes it has
You need to be big enough to be able to find a bike that fits, then just go for it.
dirt-biking is for dirt-bikes it can be either stunt or mud riding
no
To do dirt biking freestyle is "faire du VTT freestyle" in French. VTT stands for Vélo Tout Terrain (dirt bike).
no not necessarily
The army had motorcycles in the 30's and off the clock the men would race in the fields so i'd call that dirt biking.
3
when ever you want to ride