My dad used to sing a version that was weighted with slightly more explicit sexual content (playing on the 'how's yer father' sexual reference) The chorus went something like

Dear Mathilda, how I loves ya,
And I must say it's a happy home,
With a cowshed, and a pigstye,
Full of cows, pigs, and that reminds me though;
Hows yer father??? ..... Err [performer sideways glance] and yer mother?
Oh I do hope we can be alone.
I want no kisses (yer taste of onions)
I remain yours forever, though ... I've got to go.

I can't remember it exactly but he said it was a music hall favourite - although you can never trust your parents on these things. I guess the point is that the song got popularised to make lots of different cultural references; hence different choruses. I always liked singing it as a kid and never understood the pretty explicit sexual and gender references until I was older.