These pants don't look bad on her, but they have now become obstacles to Progress.  Obstacles to Progress must be removed.

He almost starts to tear them off her but remembers in time that low-tech clothing doesn't work like that, and undoes as many buttons as he sees before attempting further removal of the clothing.

These pants don't look bad on her, but they have now become obstacles to Progress.  Obstacles to Progress must be removed.

He almost starts to tear them off her but remembers in time that this won't work, and undoes as many buttons as he sees before attempting further removal of the clothing.