Sunshine

Benefits of walking on sunshine:

• Knowledge that you love me.
• Anticipation of your arrival.
• Pleasure at visiting mailbox expecting letters.
• It feels good.

Drawbacks of walking on sunshine:

• Lacerations and occasionally bleeding from walking barefoot to establish necessary skin to sunshine contact.
• First-degree burns from contact with asphalt, desert sand, etc.
• Callouses.
• Eclipses.

Air

Benefits of walking on air:

• Sweet, sweet ecstasy.
• Feeling exotic.
• Visiting utopia.
• Ability to go higher, deeper, and harder, sometimes all at once.

Drawbacks of walking on air:

• Crying angels flood earth with their tears.
• Incur wrath of heaven.
• Requires jetpack.

The Moon

Benefits of walking on the moon:

• Taking giant steps.
• Apparent immortality at the price of eternal peregrination.
• Living with you.
• Soundless footfalls.

Drawbacks of walking on the moon:

• Concerns about breaking legs.
• Oxygen deprivation.
• Low pressure causes blood to boil.
• High potential of asphyxiation in crater full of moon dust.