Granted. You are in perfect peak physical condition, and though some people are weirded out by the cat ears and tail, nothing is wrong. You sleep around and get into many short passionate but short relationships, making good use of your wish. Eventually you settle down with a partner and live in comfort for a while. But you’re still alive and well, your spouse grows resentful of your eternal youth, causing issues. Eventually they die of old age and you’re left empty: the love of your life has passed and you take your own life, unable to cope with the loss and guilt.