Answer:
Sally, Lisa, and Bernadette are triplets. But Sally and Lisa share something that Bernandette does not. What is it?
I have joy in bringing two together, but darning my existence! My life hangs by a thread, filled with ups, downs and resistance!
An utensil used for bread. Also a paper cutter. Used by a thug to take a life, Or wielded by the tamest wife, When used to spread the butter.
As strong as love, more dangerous than cancer.
You row in one while you float.
I always have to work with something in my eye. What am I?