"If the average person sleeps about eight hours in a 24-hour period, works 8.5 hours, eats 1.5 hours, commutes .5 hour, watches TV for three hours, and spends about 2.5 hours on miscellaneous activities, then compared to routine nonsexual activities, sexual intercourse comprises a relatively small portion of our time. Relatively speaking, sexual intercourse is a passive part of the average person’s life, accounting for only 65 yearly hours of involvement per year. Many people refrain from regular sexual intercourse until their twenties and are less likely to participate in it if they are not married than are married people. These estimations don’t take into account those with no sexual partner and those who abstain from sexual intercourse. The average would be much lower if those categories of people were averaged into the equation."