<text>  CNNSpirit Airlines has a new fare deal and is announcing it with sex jokes. The low-cost carrier just acquired its 69th plane and is celebrating with 69 round-trip fares in April and May that include taxes and fees -- although additional baggage charges may apply. Round-trip purchase is not required, so you could actually pay 34.50 for a one-way flight. But the airline is getting more attention for its cheeky ad copy, which obliquely references a sexual act. Weve been waiting to hit 69 planes for years, reads the offer on Spirits website. Its our favorite number -- ever since we were twelve and found that magazine under our brothers bed the one with the fantastic articles. Use your mouth to spread the word: Spirit is in an even better position to get you where youre going. Some observers say the promotion is sophomoric and has crossed the limits of good taste. You cant object to that price point, but you certainly can object to the discount airlines marketing strategy, which is so juvenile it led us to wonder if Spirits website was hacked, wrote Aaron Rupar of KMSP in Minneapolis. Spirit spokesman Paul Berry, in a prepared statement, said the promotion reflects the airlines quirky culture. Spirit isnt your typical airline and we dont want to be. We enjoy being different than other airlines, said Berry, Spirits director of corporate communications. When it comes to advertising, different means we dont spend a lot of money on advertising -- because that just increases fares. But were also different because our ads are fun, provocative, sometimes silly and often irreverent. They get lots of attention, he added. The vast majority of our customers find these types of ads humorous and accept them for what they are. We understand there is a small group of people who feel differently. The 69 fares must be booked by the end of the day Tuesday. Questionable taste or not, the promotion may be working: People were complaining on Twitter that they couldnt access Spirits website to book flights. Based in Florida, Spirit Airlines is famous for charging fees for almost everything it possibly can. The airlines defense is simple: Pay for what you want on your flight, and dont pay for what you dont want. Airline plans 15 flights to Europe . 