4 was picked because it was a nhumber that was niether to large nor too small, could divide into 60, was both the sum and the square of 2, and was a nice, well-groomed number. It was a number that you could, without much apprehension, introduce to your parents....
Re: Spidey.....
Homer: So, this is a matter transporter?
Professor: Yes
Homer: (Dissapointed)And it only transports matter?