[dawnbreez]

> This sexual behaviour statistically does not create STD spread, because of negative feedback...

You know that it's possible to infect someone while also impregnating them, right? In fact, this leads to more STD spread than non-procreative sex, because the child then runs the risk of infection as well. There is no 'negative feedback' here beyond "being upset that your partner infected you", which is already a factor in non-procreative sex.

[p0w3n3d]

yes of course. this is about negative feedback (https://en.wikipedia.org/wiki/Negative_feedback) in terms of statistical infection. People who infect each other and who will despite remain loyal to each other will not spread the infection. The child might and as well might not get infected (https://www.who.int/teams/global-hiv-hepatitis-and-stis-prog...) but this is transmission to the next generation. Also HIV positive parents could consider refraining from further procreation, once they noticed it (the infection), while maintaining their closeness and loyalty. This could break the infection positive feedback loop.

[dawnbreez]

You seem to be under the impression that gay people don't get married.