Would you break up with a SO if they changed their appearance? Why, or why not?

A friend of a friend recently got a piercing on the back of her neck. Her partner, who she had been with for over a year, reacted by making her choose between the piercing and him. To make a long story short; they broke up over it.

Personally, if I was with someone for a “semi-long” period of time and truly loved who they were, I wouldn’t mind if they decided to change their appearance. I think appearance is something that draws you to someone, yes, but I don’t think it should be the only thing making you stick around.

And after all, it is their body…...

What do you think? Would you break up with someone over a tattoo, piercing, crazy hair cut etc.? Why, or why not?