Even methane (natural gas) is lighter than air, but not by much. Carbon dioxide, which is contained in the air we breathe out and is also easily and safely manufactured by mixing bicarbonate of soda and vinegar, is heavier than air. It tends to sink to the floor and accumulate. So it's a good job that houses aren't air tight.
Cuddling, holding, and sexual play releases chemicals, like oxytocin, in the brain that create a sense of well-being and happiness, says Dr. Renee Horowitz, an ob-gyn who recently opened the Center for Sexual Wellness in Farmington Hills, Michigan.
3. Cuddling makes us less anxious. Not only does close proximity to other humans make you feel happier, it can also decrease your worries and anxiety. When you touch someone, the skin-on-skin contact signals your adrenal glands to cease excessive amounts of cortisol production, the aforementioned stress hormone.