OK guys, before you kill me here.
This clearly is a "tribute" to the classic Slime Balls Logo done by Jim Phillips. His work was one of the reasons i started drawing. It also says so on the back of the poster.
The Spermbirds on the other hand are one of the reasons I'm into punkrock plus they had a song "my god rides a skateboard", so I thought: "what a bright Idea!"