In the 3rd season there is this red monster who shows Gregory's fantasy and it is a red peach getting unzipped and the red monster blushes.

A fat chicken about to be cut up shows his butt to the camera in the 3rd season.

The character, Nurse Catherine, is believed to have a fetish with blood based on her dialogue.

My son always bleeds out of his nose

In season 3 Japanese warriors have blood all over them.

Cactus Girl attempts to hang Gregory.

Violence is shown, but is mostly mild. However, there are some bloody results.

Some examples. (There is more than this)

Mummy Dog and Mummy Papa are always seen a sharp object sticking out their heads and blood dripping.

Nurse Catherine is always sticking a giant needle in a character and sucking out their blood.

Infrequent uses of damn and hell.

Language isn't always used, but when it is, it's mild.

A father character gets drunk

Zombies drink wine on occasion.

Some characters are seen smoking cigarettes.

A bunch of satanic references

There is usually never a scene that is not scary (however I wasn't disturbed but that is just me)