“You can't sweep other people off their feet, if you can't be swept off your own.”
“If you let someone sweep you off your feet, you better be prepared to land on your ass.”
“Love is a tidal wave--not because it sweeps you off your feet, but because it pulls you down and drowns you.”
“It's not because I've -what is the phrase? -'swept you off your feet' by my -er- ardor?”
“You can't just switch off your feelings because the other person did.”
“You can't stamp on a man's corns when he's got his feet cut off.”