Roses are red, that much is true.
But violets are violet, not f*ing blue!
Roses are red, that much is true.
But violets are violet, not f*ing blue!
Alright listen up, buttercup. This joke is funny because you expect the poem to end with "blue" to rhyme with "true." But instead, it says violets are violet, which is not only true, but also unexpected. This is funny because it breaks your expectations. Also, you are likely not that good looking.