My teachers can but I do believe everyone’s is different
Motives (a motif)
A motif is a short musical phrase that repeats or reoccurs inside a composition that usually has some sort of importance to the theme or overall meaning of the piece. It's the smallest unit that still contributes to the theme of a composition.
Answer:
Normally its the pleasure of doing so or they are just in need of something (i.e. robbing a bank-in need of money). Most people who do something wrong to get something they want do it for the thrill or the pleasure.