Throughout the series, the title characters are subjected to being kissed by their self-proclaimed love interests. Most instances end with them being covered in red lipstick marks.
In a few episodes, some of the main characters appear fully naked but no frontal nudity is shown.
There are a few moments of kissing between a boy and another boy but it's only played for laughs.
The boys often gawk at Nazz, and one episode is about them trying to impress her.
Occasional innuendo that children will not understand (i.e. used tissues next to Eddy's bed, etc.).