Some questions regarding mohawks...

Hey everyone :3 First off I'm new here and my name is Gabe :] I decided to join after lurking for about a week haha. Anyways, I've got a few questions about having a mohawk. First off, I've been wanting one for about four years now but I've just never had the balls to cut one. I finally told my parents about the idea about a week ago when I found this site and they were appalled by it :/ lol. I've decided to get one anyways as after all it is my hair and I'm amazed enough that I've worked up the balls to decide to do so. So, I was planning on doing this myself tomarrow after I end school so It will be interesting to see how it comes out xD I might have to shave it all away and just grow it out from scratch. Anyways here are some quick questions I've got:

What do you guys ( and girls ofcourse ^^ whom still go to school) do during P.E class? Do you guys wear it up or down? I'm quite lazy during P.E so sweat wouldn't be much of an issue.

How do you guys survive the friggid weather without hats? :( I'm one of those people who abuse hats and wear them indoors and outdoors during all seasons xD Basically, do you use earmuffs or other kids of semi-warming gear? :3

And finally, could anyone share some advice on cutting a mohawk from long hair (Well, long for a guy) ? I've seen the "tape method" on youtube for guys with shorter hair but I was hoping to save some length.

Thanks beforehand and excuse my grammar mistakes ._.

edit* Thought of one more, haha :p How wide are your mohawks? I've got absolutely no clue on how wide I'm gonna cut it.