Men do sing in the bath tub or shower. And it's up to the wise wife to see that this happy mood isn't broken.
8 seconds sound clip from the You Can't Take It with You (1939) classic radio play.
You can hear this line at 00:24:51 in the radio play.
Quote context
[...]
- Here's what we've heard nearly everyone say. Women are different from men!
- Ladies, when bathing, are not half so gay! While men sing or whistle and then sing again.
- If they're Irish, the tune goes like this... If they're Scotch, here is one they won't miss...
- Maybe they'll whistle and you will hear... For men are always full of good cheer...!
- That's enough, girls, that's enough. You've proved your point.
- It makes a bath a pleasure and, best of all, it leaves a man sure of fastidious grooming.
- We have a two-line encore to our song.
[...]