My metaphors are based love.
1) Love is a flower. Failing to water it will cause it to whither. I was going to take a fake plant and have some of the flowers barely standing while one was whithered on the ground and falling apart.
2) Love is a chemistry set. Mix the wrong ingredients and you get trouble. Taking a few glass cups and bottles, I was going to make a chemistry set with love and troublemaking ingredients and have them mixing. I was also going to break some of the glasses and burn the case I am going to put them in.
3) Love is a Lamp. It may not be around in the light, but it will always be there for you in the dark. I was going to take a few old lamps, place them together, and put some lights inside of them in a dark area. I was hoping to make a shadow effect with the way I played with the lights