Can you eat me out

Eat it all before you come in, that's the rule.

Eat it completely, that's the rule to enter.

Eat it all, the rule's pretty simple.

Eat it first, that's the rule

Eat it all, one rule to enter the fun

Eat it before you enter, simple rule

Eat it before you go in, that's the only rule

Eat it before you enter, one rule

Eat it to get in, that's the rule

Eat it to enter, one simple rule

Eat it before you step in, that's the rule