I guess it comes down to whether you can hear these things or not. Even with the dots, I still find it quite difficult to get the rhythm right; clearly you, pen and the other participants found it less of a strain and so I'll shut up.
No offence was intended, and I apologise, seriously and unreservedly, for causing it. While I disagree with GIII, I will bite my tongue and I won't argue the merits of this particular limerick further; anyway, as rab said, such matters are at part in the ear of the beholder, or the eye of the listener, or something. My posting in part reflected my general feeling that the limericks here and elsewhere have been below average quality over the last few months because several people don't spend enough time thinking about scansion and stress. As a result, I find myself posting less and less to them. The fun in the game is in collectively crafting a well-formed and funny end product; if we are not succeeding in doing that (and more often than not I think we are not), then the fun disappears for me. Others of course disagree, and that's fine.
I should add two things: (1) I am of course as guilty as anyone of the occasional bad line; and (B) I think pen typically contributes some of the very best limerick lines, and so I am particularly sorry that she was in my line of fire.