Right on the back of my neck,
Completely sopping wet.
Soaked with spit and germs.
I make a face and turn,
To see him laughing,
and holding a straw.
I drop a napkin in my milk,
then bunch it into tiny ball.
Ha! Ha! I hit the jerk.
Oh my, I loved it. At first, I was a bit iffy about it because I thought that you're flow was a bit off, but once you read the end line, it all just slots into place and seems really cute, to be honest. One suggestion; try and vary your punctuation from just a plain old comma.