and on subject...
really in my relationships the sex never went "boring"
you have to choose someone you really really like.... and love to look at.
people often settle for somebody, that is where it goes wrong.
i remember 1 ex of mine, just looking at her ass and i wanted to jump her on the spot!
even after a few years....
she loved sex, all my ex girls did though... lol!
i think you have people that just do not enjoy sex that much.....
you know boring people = boring sex...