Who hasn’t thought about what they’d do if they had the chance to go back in time and change something? Maybe you’d find a way to prevent an evil dictator from being born (Hitler, Castro, Pol Pot), stop John Wilkes Booth from assassinating Lincoln, save the Romanovs from being murdered.
The problem is you could never understand the full implications of what such a move would be. How would it affect your own family if world events had worked out differently? Maybe your great-great-grandmother wouldn’t have married the man she did, if your would-be great-great-grandfather hadn’t died in a war.
Say that in going back in time and meddling with things, your beloved’s great-great-grandmother’s village was invaded by the armies of Arachnovakia, and your beloved somehow ends up being born to an Arachnovakian couple. Arachnovakia worships spiders, and you hate spiders. Rumor has it they were themselves descended from spiders. Word on the street is they have spiders nesting in their hair. Heck, their hair is made of spider webs. Maybe wheels are considered evil in Arachnovakia just to top it all off (’cause they roll over and crush spiders). Consequently this person never even learned to ride a bike. They don’t have cars or even horse drawn wagons in Arachnovakia. He or she would have had a vastly different experience growing up, and would not be the person you knew. (I really think I’m going to have to write more about Arachnovakia. Why do I keep hearing Groucho Marx in my head?)
It’s that mystical convergence of energy at the right time, the right place, with the right lighting, or topic of conversation. If it’s someone you’ve known for awhile, you may suddenly ‘see them in a new light.’ It also depends on the state of mind of the persons involved at the crucial moment. If your significant other had been blond, or a foot taller or shorter, how might that have affected your perception of him/her? Would you have even approached them for a date, much less married that person? Who we are is a delicate balance of our inner nature and the environment that produced us.
There was an episode of Voyager where an alien race was instantly forgotten after they left the presence of any other (they gave off some sort of pheromone or something that prevented the brains of other species from retaining the memory of them). Chakotay (Robert Beltran) had fallen in love with a woman (played by Virginia Madsen) from this race, but when she was forced to return to her planet he instantly forgot her. When they ‘met’ a second time as she tried to get Voyager to take her with them, the sparks didn’t fly for him. She was still in love with him, but that magical moment didn’t come again for Chakotay. Who we’re attracted to has a lot to do with our own mental state when we meet that person. Maybe she caught him on a bad day when he was missing his Maquis buddies. It’s possible that had she been allowed to stay on the ship Chakotay’s feelings towards her would have sparked again in time. This is why fix-ups and blind dates rarely succeed. You can’t engineer this many variables to coincide favorably for two parties at the same time. Either it will work or it won’t, and there really is no way to know.
So back to our time travel and unintended consequences. Your Arachnovakian sweetie is still a lovely person, except they’re also a different sex this time. Whichever gender you identify with and are attracted to, if your love was the wrong sex for you to be attracted to, it would not be the same. Most people are not bisexual. If you are, well, lucky you. This might not be a problem for you. But the essence of the person you love would have been irrevocably altered. And that could be a problem for anyone.
Anyway, the point I am trying very inarticulately to make is that human attraction is a mysterious, unpredictable phenomenon.
Best to stay home, and leave the time travel to the professionals.
Ok, maybe not those guys.