One thing the articles you find on google don’t mention is how your body wants to limit activity when it’s hot. Mid day heat? Your body naturally wants to slow down and / or fall asleep to conserve energy. Similar to a heat blanket?
Or. After having sex, say a man is with a female partner, your body gets sleepy, you fall asleep next to them, bond, then raise children. An obvious advantage
Are these accurate in any way as to what the main factor could be?