I like making my own paper bags. I'm weird that way. But every now and then, I forgot how to make them. So I ended up fumbling with my papers and glue for more than the reasonable time to make a paper bag. Not to mention I messed up the paper pretty bad before I managed to remember how to do it properly.
Anyhow, I know that there are dozens of tutorial out there on how to make a paper bag. But as far as my keywords on Google went, none of them helped me remember because none of them are like how I make my paper bag.
I learned how to do it this way from a Japanese book on craft for children when I was little. Lost the book, hence the constant memory loss.
