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.
Hugs, kisses, and cuddling increase oxytocin levels quickly. As per WebMd a research on oxytocin and how men react to sex showed that under the influence of oxytocin, two areas of the brain responsible for feelings of reward and pleasure lit up when men saw their partnerâs faces.