You've probably head of the Midas touch. It was a story about a king that wished everything he touched would turn to gold. And when his wish was granted, he was happy until he realized his touch turned even food and people into gold.
Second Life is the same in some ways. We can look good, along with everyone else, and we can sail, and swim, and walk through beautiful fields of flowers, and watch amazing sunsets, but we can't touch anything. We can't smell the flowers, we can't feel the sand between our toes, and we can't feel a lover's kiss.
Otherwise, it would be perfect.