I saw this short film about time travel called Hirsute a couple years ago at a film festival and love the tone and simplicity of it.
A man trying to invent time travel is visited by a future (parallel) self who is more arrogant and devoid of body hair. The movie plays with time travel and sexual themes, but in my mind is really about identity and self-perception.
It's well acted and directed and takes you places you probably don't expect. All things a good movie should do.
You can watch the entire movie at the Internet Movie Database site. Here's the URL.http://www.imdb.com/video/wab/vi1670644505/ You can also catch it at the Vimeo site here: Hirsute. It's about 14 minutes long.
Visit the film makers A.J. Bond and Amy Belling website at http://hirsute.thesiblings.ca/
Read a review of the film here - TIFF 2007: Hirsute And The "Many Martys" Theory