But, sadly, our manly struggle to conform to the slave-like work rhythms of present-day custom has led to the nap being replaced by that costly and damaging drink, coffee. As paracetamol is to the cold, so coffee is to the nap: a way of riding it out, a sort of competition with one's own body, a civil war. When we feel tired after lunch, the socially acceptable solution is to dose up on coffee and ride out the tiredness, rather than simply take a nap. The coffee may produce a temporary perking of the senses, but irritability will follow, not to mention a sleep debt later in the day. You cannot win the battle against sleep. Don't fight, surrender!