|*Kandinsky, Yellow, Red, Blue|
The idea that a moped is safer than a motorcycle is insulting, because the only difference is that one goes faster: Therefore, you are saying the rider is too irresponsible to drive a safe speed on the motorcycle, whereas the moped just limits his or her ability to get out of the way.
There. An argument. Now, Joesky's Rule.
You probably know that synesthasia is the state of experiencing one sense or perception as another. Tasting colors, seeing sounds, etc. What you may not know is the condition has many interesting variations. Several of them could be very entertaining after-effects of miscast spells, potions, fungal spores etc.
Here's three I thought would be fun as temporary effects: