Pretty much any two lines can come after this, as long as the last word of the last line rhymes with "Blue." A few examples are...
Roses are red and violets are blue, Got kids in my basement and I'm coming for you!
Roses are red and violets are blue, Your mom is gay and so are you!
and the most common...
Roses are red and violets are blue, sugar is sweet and so are you!
Where you haven't had sex in a while and your body is not used to it and you get random boners without thinking of anything sexual
A mixed drink made from blue Hawaiian Punch and whipped cream vodka.
That blue mamba last night was the best thing I ever drank!
When someone is talking loudly and pacing around for quite a while and you have to look and see if they are wearing a Bluetooth in their ear but they aren't. They are full-on talking to themselves and the voices in their heads. Not judging, just sayin'
Wondered if I could help this dude at the clinic walking back and forth in the parking lot Blue-toothing hard.
When you pee in the pool and the chemical that turns your urine blue takes effect.
yesterday my little brother took a pis in the pool and it turned into a blue pool when the chemical reaction occurred.