Is monogamy unnatural and inherently monotonous that sexual boredom is inevitable in a long term relationship?
I have often wondered if this is not a plausible explanation for the reason why most married couples or long term partners are often “too tired” to have sex with each other, but not with anyone else.
A friend of mine once said he was at a stage whereby he was having sex with his long term girlfriend as a form of maintenance to the relationship. The excitement, the longing, the rush that one gets with a new partner was long gone. Have our morals got ahead of our natural evolutionary instincts? I would suppose for a strong and resilient genetic make-up, we have to cast the net as far and wide as it's humanly possible. Do you agree/disagree?
Incidentally, this phenomenon has been observed in most mammalian species and has been termed the Coolidge Effect. However, I could not find any scientific study done on humans.