The leech had been removed but the blood on his swimsuit would never leach out of the fabric. He never wanted to swim in this pond. His friends thought it humorous to say he was a coward. However he had seen the leeches before. Snakelike swimming creatures that swirled around your legs if you disturbed them.
He fell for their taunting and now has a welt near his humerus bone from being attacked. Just thinking of the feeling it gave him, wrapping around his arm, gave him repeated fits of the chills. Upon the other boys seeing how truly shaken he was, they stopped laughing.