This nails it right here, #1 and #2 especially.
Sex is fun, sex is awkward, sex is weird and messy and life-changing. Sex is mundane, sex is cathartic, sex is funny and sex is cardio. Also, sex makes people, oh and it feels good. All that is pretty fucking magical if you ask me.
What is done in private between consenting adults is none of your goddamn business, including porn. Don’t use kids as an excuse to control adults’ behavior.