Hi Em (and others),
first of all: this idea of a poetry machine is great! It's fascinating to see the weird ways of the human mind. One question - are you given the first line, or can the first person choose freely? Anyway, concerning this poem:
a) I really like the second line, the image of the cake as a living organism is wonderfully creepy-intriguing-decadent.
b) I had to chuckle when the poem takes a more serious tone, but uses such trivial wordings ("My life's course is going in circles", "And wonder what I'm here for") it seems more mundane than the cake
c)The end is very random - maybe a bit too repetitive, as in "The smiling child..." and "The child laughed...", you could've done with some new images there.
All in all, the poem is enjoyable in its silliness :D
So, which line is yours? I won't dare to venture a guess...

i have to say it's difficult to review stuff like this, lol. it's not a bad collaboration, the metaphor of the cake is nicely entwined with the idea of a rotting life. i found the first part to be stronger (apart from the repetition of 'skin of sugar' - the idea is good but the wording could have been more creative. the rhyme scheme in the second half detracts a little from strength but i like the visuals there. not bad at all though, considering each person only had the preceding line to work with.