Magic attack.

As the prince when through the nasty sewers he saw a magic book. As he grabbed it and opened it up, he found and read the following words

1.) Your so disgusting, that whenever your dirty, you feel yourself browning as well.

2.) Your so gross, that garbage and sewer water loves you.

3.) Your so Filthy, that sewer water give you horniness.

4.) Your so repulsive, not even your armor can stand you.