I have friends that have been in relationships from many many years for whom the chemistry was a ver

Can you manufacture chemistry? It's a question that often comes up with my friends where we argue about whether chemistry is something that's just immediate and you just feel when you've met a certain person and you're just drawn to them in that way where you just feel like you just want to tear their clothes off and just have sex with them, or you meet someone and perhaps that spark, that initial spark, isn't there but over time it develops and you find yourself feeling more attracted to them. My friends think that definitely the latter type of building up to chemistry is a more long-lasting way to have a relationship, whereas the kind of immediate spark kind of chemistry can often fizzle out when you realize that the person that you're with, you're just not compatible. What do you think? I'm curious to know. I'm one of these kind of immediate chemistry people, and I'm always surprised surprised by this notion of this kind of longer drawn-out chemistry, probably because it's just not something that I've experienced, but I'm willing to have my mind changed.