I've been considering this further. Lol would have become widely used with text messages which is when I came across it, it could have been used back in the BB

I've been considering this further. Lol would have become widely used with text messages which is when I came across it, it could have been used back in the BBS days. "I accidentally a" is basically just teenage humour. I accidentally <implied sexual thing> a $X. (Obviously becoming more funny the more unlikely it is for any sexual thing to work on whatever $X is). On top of that you've got the weird language construction, just like speaking like Yoda is hilarious, and you have the perfect thing to spread throughout the playground. Although internet usage doesn't imply the sexual act. I accidentally a house Means i accidentally built? A house. Not I accidentally had sex with a house.