no. people always pin sex with relationship. they generalize all couples that once they have been together for a long time, there is a need or it is required to have sex. the truth is that, it’s their choice. but hey, there are still those couples who respect each other and waiting for the right time to do it. there are still those couples who are still together because they love each other and not because they want sex. so once you knew a couple who have been together just for sex, think again. not all couples are the same. all relationships have unique characteristics that you cannot compare.