My younger sister told me that
(of the two of us she was always the brighter)

'...that the man puts his thing
into the woman's thing 'n'...'

I said: 'No more...how could it be so! '
'I mean...how stupid can you get! '

'Why. . .! '
(I informed her with an elderly brotherly tone)
'...would he want to do such a thing...mmmmmm? '

'And why...! '
(and this was the clincher)
'...would she let him? '

'Hmmmmmm. . .hmmmmmm! '

I rested my case and smiled smugly
at an invisible judge and jury.

She defended her information tigerishly:

'I don't know...
...but I know what I know! '

I dragged her to Mam & Dad
(surely if anyone should know they would know)
and said: 'She says...! '

I explained the whole lucicrous situation to them.

'Tell her...! ' I told them.
'Tell her...it isn't so! '

My Dad said: 'Ah well now, son...ya know...? '

I cried: 'No! '
& ran away & hid!

***

Gradually over the years I
grew accustomed to
the concept of it.

Until now
(why!)
I quite fancy it!

And see...
the method in the madness!

Dónall Dempsey

http://www.poemhunter.com/poem/when-ignorance-is-bliss-tis-folly-to-be-wise/