Bitter Sweet

Just for the record, the form is terza rima (triple rhyme) -- although to be perfectly correct your close would be a rhymed couplet, regardless of the number of preceding stanzas. 

There are some rather disgusting images here -- all to the good.  It's actually the first line that doesn't work for me metrically -- also the last creates a small issue with the feminine ending, rather diluting the rhyme.  I'm not at all concerned about content though, if you're going to say it you might as well say it forcefully.