Do you have a source for that? I don’t see what impact consumer email software would have with the composition of the heat shield.
I believe this one would fall under "incongruity theory"
https://en.wikipedia.org/wiki/Theories_of_humor#Incongruity_...
its a joke, no sources required
He's saying it's bulky junk that's best torched.
I believe this one would fall under "incongruity theory"
https://en.wikipedia.org/wiki/Theories_of_humor#Incongruity_...