My boyfriend (I'm pretty sure) has a button fetish. He wanted to surprise me last fall, (birthday present) so he looked at the tag on one of my bras (I wear a 32D) and went to a shop where he looked at "blouses for a girl with a 32" bust." Which is not the same thing, lol. The fabric of reality is strained, shall we say. He bought me a couple of button up the front blouses and a Western style shirt with snaps. He loves to help unbutton them and take them off, but equally seems to love buttoning them back up.
His breathing gives the game away,
and at first, I think he was embarrassed. But I love pushing my breasts right up against him, and being kissed while he undoes the buttons.
So, as fetishes go, this is pretty innocuous.
Lindy