After years of opening envelopes from bank statements to utility bills, I noticed that I tend to always tear off the right side of the envelope (I don't have a letter opener knife).
I've noticed that I've never managed to tear the contents of the envelope (maybe just once though, when I tore off more than 1.5cm)
Would I be right in saying that the machines that print and insert the contents so they "hug" the left inside edge of the envelopes are designed to do so on purpose?
PS. This is the only relevant stackexchange site I could think of ask this question. Feel free to tell me to sod off to another!