What To Do If You Meet Your Doppelganger?

*Spoilers Ahead* Enemy (2013) with Jake Gyllenhaal is a recent movie I watched where afterwards I sat back and thought, "what the hell was that?" It follows one version of Jake Gyllenhaal that is a well-mannered guy, a professor, reserved, has a steady girlfriend, and he's basically pretty average. This version of Jake Gyllenhaal watches a movie with what appears to be himself in it, but we soon find out it is an "evil" doppelganger. They eventually meet up and get freaked out, but the evil version wants to switch lives in order to escape his reality with a pregnant wife for a little bit. The movie starts out quite slow but then it escalates very quickly towards the end. At the end the mild-mannered character's girlfriend discovers it isn't actually him she was sleeping with and while she's in the car returning to the city with the evil version, they get in a fatal car crash. While that is all happening, mild-mannered Jake Gyllenhaal is moving in on the pregnant wife (because why should that guy have all the fun?) At some points we think she knows it isn't actually her husband, but the evil character treats her so bad anyways she's fine with it and goes along. The ending is something to be discussed. I scoured the internet looking for what it means or having it explained, but no one can ever straight up tell you. The joy about movies is they're mostly open for interpretation. Anyways, the end of the movie is the pregnant wife being replaced by a giant spider which has been foreshadowed throughout the film. The "good" character goes into their bedroom and discovers a giant spider in the corner, they look at each other and then... cut to black! Other viewers have written online that they believe there was no doppelganger at all and this man was just living two lives, which is a reasonable interpretation, but no one has ever confirmed. Why make sense of it anyways? Denis Villeneuve created this beautifully colored feature with an interesting plot and in interviews doesn't elaborate much on any of it. It took awhile to grab me but by the end of the film I was wanting more. I believe that's what movies are all about. This is also one of those movies where you might need to watch it more than one time to get the full effect, you know more knowledge after watching it the first time and are able to go back in with a different viewpoint and see how he could possibly be the same person and just living two lives. This film confused me to no end, but I overall thought it was a quality feature.