Last year Spirit Airlines had something called a M.I.L.F. Sale. They played it off as an accident, but I don’t think anyone believed them. Now they’re at it again, this time with an otherwise generic online ad that “accidentally” puts the word “muff” next to the word “diving.” Hmm, maybe that customer service number that really directed callers to a phone sex line wasn’t an accident, either. I bet if you fly Spirit Airlines and ask the flight attendants for some salted nuts, they burst into shameful giggles and run off.