A magic place of entrance, in which people can enter a place then remove the entry hole by closing it. It prevents drafts and people seeing you fuck. Also zombies can't open them.
"Phil, check out that sweet door, you can walk through it, go on walk through it you silly cunt"
A sweet song by Megadeth, written by Dave Mustaine when he was still in Metallica, they took it and changed it to four horseman. Mustaine responded by making it really fuckin' fast and putting it on Megadeth's debut album killing is my business, which is also amazing. It is about working in a garage and fucking a female customer.
"make my drive shaft crank, make my pistons bulge, make my ball bearing melt from the heat." Lyrics to mechanix