There is an overly provocative waitress at the Diner in the movie. She just flirts with Fred like asking him is he was dreaming about her.

A man and woman kiss in a dream. It is then revealed that the man was kissing a dog in real life.

Daphne reveals her bare shoulders for all of the scenes she is in.

A female alien character is featured in several scenes with no clothing, though the only real features in this form are facial.

A character implies anal probing when describing his alleged abduction by aliens. This is seen from outside, so nothing is actually heard. Only adults would understand.

Fred smells the inside of Shaggy's water bottle in one scene. Presumably, Fred was either seeing if Shaggy was sneaking liquor or if there were drugs in the bottle that Shaggy was snorting. Only adults would understand.

Alien invaders can appear menacing

The "Aliens Are Here" song can be scary, as the vocal distortion sounded evil in the middle of it, despite that the lyrics are mild.