These two verses are:

So soon to bed they did retire
And the knight soon naked there lay
The maid put off her little white smock
Crying, Laddie, are you ready?

It was all night that they did romp
The floor it was a-creaking
So rampantly they rollicked on
There was no time for speaking.

Benji Kirkpatrick's mind is of such a smutty disposition that he has been known to add rude lines from different songs if he doesn't think the current ditty graphic enough already.