1. Chocolate, especially chocolate ice cream. You can't mess with the best.
2. Making people laugh, especially my daughters.
3. Reading a good book while warm and comfortable.
4. Sex. (Although it can be argued that this isn't a *simple* pleasure.)
5. A good back rub.
I'd like to put in a vote for two honorable mentions: listening to beautiful music without distractions, and the smell of flowers in the spring.