So that's lust obviously.
You know love at first sight that sort of shit? Mostly named infatuation?
Here's the answer.
When boy meets girl, falls head over heels, he actually thinks he's in love. It's the cause of one protein that is produced in the brain at high levels. The Neurotrophin levels: NGF, BDNF, NT-3, NT-4 increase greatly during this acquaintance. This is for the term "chemistry". So on the average of 3 years, this protein would be slowly be reduced to it's normal levels which explains the term "honey moon period", after this that's when we actually use logic to pick our someone to have a future with. The couple's loyalty.
The 7th year.
So we know, the 7th year in a marriage or relationship is the ultimate test right? No hormones anymore and 4 years of constantly seeing the same person, beside you, on the couch, at the dinner table. 4 years of probably the same bad habits and dying topics to talk about. Some people cannot take it. Intimacy, communication and whether they have enough memories to pull things through.
So technically in a scientific based assessment, love is a chemical.That's probably the reason why most old couples say love doesn't exist or when they start sleeping on separate beds. It's called emphatic love.
"Because you love and care for me that's why I feel I owe you something."
And affairs in a man's life isn't really anyone's blame because we have a protein that causes us to be that way.
So also technically it seems that we humans seem to defeat what we always say "We're of a higher level compared to animals."
This is one of the saddest thing I've ever heard of.