Well, since somebody else posted a parody, I feel moved to share another. My sister and I did this one a while back, one particularly silly evening, so any blame is mine. This may work better for female dementians....
I look stupid in this negligee
'Cause my butt sticks out this funny way --
Oh, why'd I buy this negligee?
I am twice the girl I used to be;
Flab is hanging out all over me --
This negligee's a travesty.
Why it doesn't fit I don't know, I couldn't say;
I did something wrong when I bought this negligee.
I would like to take it back today,
But I threw the damn sales slip away --
I'll have to keep this negligee.
Hmm mm mm mm oo oo oooooo.