Quod licet Iovi, non licet bovi.

Went to the optometrist, again. Told him that I'm having trouble with the new glasses. The temple arms (sides) are too tight, and hurt my head. "No problem", the man says. Takes out a pair of pliers, and starts bending the arms. I was a bit surprised - "wow, I had no idea you could bend them like this without breaking them". "There's a difference if I bend them and they break, and if you bend them and they break", he said.