[The good news is that Peter heals super fast, so once he stops gooshing blood everywhere it'll maybe take a day or two for him to heal up. The cold, he's just going to have to deal with for a while.]

Right now it's because my face is cold, and also because I don't want you to see all the weird faces I'm making while I freak out. Back home it was to hide my identity so that people don't start getting all up in my personal business. Didn't really want cops and/or bad guys kicking my door down, either.