The Fuck-Off Fairy teaches you to stand up for yourself and believe in your value. She gets that sometimes "fuck off" needs to be said politely and with a smile, but while delivering the message clearly. She is an important part of the coming-of-age process.
Although she typically comes at 30, some people are lucky to get their Fuck-Off Fairy visit at a younger age, others may have to wait a bit longer. It is worthy of note, however, that it is never too late for you to invite her to visit you!