The use of the term "monkey poo" has resulted in many a child wasting a substantial amount of the banana for fear of eating the "icky" part.
It is NOT used in the presence of a wizard who was turned into an orang-utang in a magical accident because said orang-utang hates to hear the word "monkey" and WILL go apeshit.
(Before entering the presence of said ape.)
A phrase when mouthed to some one (your girl) looks like you are saying "i love you". When you finally get busted and she accuses you of lying, you can honestly say you didnt.
When you mouth (and make sure you dont utter a sound while you do this) this to your girl it appears as if you are telling her, "I love you."