Logic!!!

Following is probably the best known and most celebrated of all lateral thinking logic puzzles. It is a true classic. Although there are many possible solutions which fit the initial conditions, only the canonical answer is truly satisfying. However, surfing through a forum I found some interesting comments and solutions.

PUZZLE: A man lives on the tenth floor of a building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator and, if there is someone else in the elevator or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment. Can you explain why?

SOLUTION: The man is dwarf/midget/handicapped. If he has an umbrella, which he carries on rainy days, he uses it to reach the tenth floor button. If he has company in the lift he can request to punch the tenth floor button. Else it is the 7th floor button that he can reach and rest of the floors he walks up the stairs.

COMMENT 1: May be he is seeking attention. :-)

COMMENT 2: Why doesn't he use his umbrella to reach the tenth floor button if it isn't raining outside? LOL

COMMENT 3: Why does he not carry pen or pencil everyday. (Note the puzzle does not mention that he is uneducated.)

COMMENT 4: This man is married and his girlfriend stays at 7th floor. When its raining he gets drenched and who wants to meet his girlfriend when he is all wet. If someone is in the elevator he tries to avoid notice and retribution. On the other days, he visits his mistress on the 7th floor and walks the three flights to avoid detection, and explain why he is sweaty and out of breath. This also gives him an excuse to rush into the shower.

COMMENT 5: Another dumb riddle. The question asks "Can you explain why?" Answer? "Yes" or "no." You can or you can't. The question should just state "Why does he do so?"

COMMENT 6: This needs to be qualified as "the dumbest dwarf in the world". Why would he walk three flights of steps, rather than stand on tips of his toes, or jump one inch, or carry a cane or stick or pencil, or wait for someone else, or make any sort of arrangements with his living space to not so grossly inconvenience himself on a daily basis.