Yeah. Pheromones fuel the madly-in-love 18-month passion. When your system adapts and they no longer interfere with your emotions, it's time for shared interests, compatible personalities and all the rest to take over the fuel the long-term commitment. All the hair stuff - look at photos from every decade since 1900 and you can see how hair fashion and "fashions fashion" change every few years, shaping our idea of "attractive." There is apparently no universal condition that is "attractive." Silly example: trimmed eyebrows on men. All the rage now. Not when I was a kid. Do that in 1960 and you wouldn't be able to return to school until they grew back in, women with little kids would cross the street to avoid you, and men with intact eyebrows would raise their's if you interviewed for a job.
That's my story and I'm sticking to it.
I don't see it as a bad thing or a good thing, just a thing that explains a lot of irrational behavior on the part of people who are attracted to each other. :-) Kind of a trait that insures people get pregnant and the species continues whether we actually think about it or not. (And OK, not everyone is susceptible.)