What about "helps propogate the species?"
C'mon, no biological explanations, please, only theological explanations will pass the smell test among some of our more right leaning members. In realty, sex is a pleasurable, activity. In the skewed reality in which we are supposedly headed (Christian theocracy), sex is a gift from God that only married believers may participate, otherwise it's a dirty, animalistic activity. Guess what, we ARE animals, simply more developed than others, therefore we have the need to participate in certain activities, whether or not a bible, torah or quaran says it's OK.
Hedonism based study.
The study seems to be based on the ASSUMPTION that feeling good the reward for sex. NOT that procreation is the reward for sex.
Just as leftists want to eliminate children from marriage law, so it seems this study wants to remove continuation of genes from evolution.
All the health benefits mention are to keeping the mother and father alive to ensure they produce more offspring.