I dunno, it's not real important, it's just that I read an article on the chemical basis for love. Everyone thinks it's dopamine, and to a certain extent it is, but dopamine is mostly the 'novelty' factor (like when you're first getting involved, and infatuated and stuff), and sex and stuff. Dopamine, is of course increased, and they thought it was responsible because it multiplied a bit, and the quantity increase was great as well.
However I was reading Psych Today a few months back, and IIRC, they said PEA was responsible for the 'cuddly' and 'puppy love' parts, and long-term attachment, i.e. 'true love', if you believe such a thing exists (well, I should rephrase that, the PEA isn't 'responsible' for it, an increase is just one of the effects of it). Since PEA is present in lower amounts than dopamine, scientists ignored it, but the increase ratio/percentage-wise was larger than dopamine, and like I said, it was raised more during the 'true-love' (quotes emphasized there) part of a relationship.
So I wanted to use this reference in an argument with a friend about how amphetamines are a replacement for love, despite the fact that if PEA is raised by 1600x, you're probably going to get some paradoxical effects as compared to 'lovey-dovey/cuddly/supportive'. But it'd still remove the need for love.
Hell, talk to any frequent speed/meth user. I was reading a post the other day on here about how when you make it a habit it begins to replace your needs for everything (he mentioned sleep, eating, hobbies, friendships, and yes... love).