Many of our laws were at least initially produced in a religious or other framework that implies universal morality. I am in favor of reviewing and reconsidering laws where we can't seem to find a non-religious justification.
For the public sex example you raise, we have plenty of evidence and experience that shows the further you get away from adults doing consensual sexual things either alone or around other consenting adults, the more likely it is that someone may be psychologically harmed. Getting the consent of everyone in a public setting is pretty hard.
Aside from religious folk, most people don't have a problem with strip clubs, sex clubs, sex parties, nude beaches, etc where a bunch of consenting adults are naked and/or behaving sexually around other consenting adults.
So no, I don't think people should be allowed to have sex in public, and it is not based in religious or cultural belief. It's based on evidence that non-consensual sexual situations (including observing someone else's sexual behavior) causes harm, and that it violates others' right to not consent to the sexual situation.
For the public sex example you raise, we have plenty of evidence and experience that shows the further you get away from adults doing consensual sexual things either alone or around other consenting adults, the more likely it is that someone may be psychologically harmed. Getting the consent of everyone in a public setting is pretty hard.
Aside from religious folk, most people don't have a problem with strip clubs, sex clubs, sex parties, nude beaches, etc where a bunch of consenting adults are naked and/or behaving sexually around other consenting adults.
So no, I don't think people should be allowed to have sex in public, and it is not based in religious or cultural belief. It's based on evidence that non-consensual sexual situations (including observing someone else's sexual behavior) causes harm, and that it violates others' right to not consent to the sexual situation.