I've worn corsets during a date.
With some guys, yes it is a fetish of sorts. They love the look and feel of them and it's not something one sees everyday.
Some gents ask me to remove it and others prefer I leave it on.
As long as you don't tie it too tightly and allow for more movement than you normally would it's good.
Tie it tight as you would for "show" and it can be too constricting for free movement, especially in those "tricky" positions.....
I love it myself, just dressing up in my lingerie makes me get excited thinking about whether or not it will be staying on or hitting the floor.