Hammer
Every now and then, Tripp had an uncanny urge to smash his left thumb with a hammer. He never wanted to nor did this with enough force to crush the bone. Each time he engaged in this exercise, he only did it just enough to cause some pain. Tripp thought this action would give him a rush or an endorphin release—and it did. But it also made his thumb hurt. So he often found himself searching for all sorts of solutions to settle his throbbing thumb. Mostly, he just had to wait for the pain to cease in its own time.
One day (having smashed his thumb the night before), Tripp awoke in extreme pain. Again he tried his usual list of remedies. But this time Tripp realized that pain was an inevitable consequence of having hammers hitting thumbs. So he embraced the pain as long as it lasted — and avoided hammers for quite a while.
After a time of healing, Tripp’s convictions concerning the evils of hammers became so strong that he set out to campaign against them. He wished to rid the world of not just hammers — but all household tools!
However, after much exhaustion, he decided that others just needed to hammer these things out for themselves.