Gee, Hope Ryan Air don't read this, they will start to charge 2 quid for PAX, 4 quid for Sir, 6 Quid for Madam, (it's longer) 8 Quid for Guest and a 10er for Surname including a packet of peanuts!
Only flown Ryanair once in my life (and that's probably enough) but, if I fail in my attempts to not fly with them again, I'd pay the £4 for "sir"