My wife and I often change diapers for our two young children at our seats. We've done it in F and Y, thank you very much. We do so on any CO aircraft that does not have a diaper changing table in the lavatory (hence, most of the time since it seems like we're usually on an older 737-300). If there's a changing table in the lav then we use it, of course.

The lavatories are so minuscule that it is impossible to change a diaper in them unless there is a changing table. The flight attendants will not allow (understandably) the changing of a diaper on the floor of the galley. Thus, there's no other place to change a diaper on an aircraft that does not have changing tables in the lavatory.

There's a clear answer to this: if the public health threat to changing a diaper is so serious as some suggest, airlines should be required to have one lavatory on board that can accommodate parents flying with small children (and people with disabilities, I might add).

I don't like smelly diapers any more than the next guy, but I blame the short-sighted engineers who improperly designed the airplanes to not accommodate such a foreseeable universal human need, as well as the airline which purchased the flawed product. I laugh when I see disposal slots for razor blades in a lavatory but no place to change a diaper; that's just lousy, short-sighted design.