[78-L] the song title switcheroo

[Malcolm Rockwell]

I just spotted an Annette Hanshaw record on eBay that got me thinking (I 
know, I know...). It's "Ain't He Sweet?" on Perfect 12353 which closes 
in about 2 hours. I have seen many instances where a song title written 
to be sung by a man was sung by a woman and vice versa, without changing 
the gender within the tune. But what was the first instance where the 
switcheroo was made?
Malcolm