At 7:30 am, the body produces a surge in sex hormones and a rush of adrenalin to get a person going in the morning.
"You'll both be rested, with heightened senses. As you're still waking up, you tend to be more responsive," the Sun quoted sex therapist Suzie Hayman as saying.
Research in Italy revealed that it is also the time most couples are likely to orgasm and conceive.
And that's not all...
According to the research, adults who make love first thing in the morning apparently not only feel more upbeat for the rest of the day, but also benefit from a stronger immune system.
The study suggests that adults who begin their day this way are healthier and happier than those who simply opt for a cup of tea and some toast before heading out of the door.
Not only does it make them less likely to catch a cold or flu, it can also improve the quality of their hair, skin, and nails.
"Having sex in the morning releases the feel-good chemical oxytocin, which makes couples feel loving and bonded all day long," the Daily Mail quoted Dr Debby Herbenick, an American research scientist and sex advice columnist, as saying.
Dr Herbenick, author of the book Because It Feels Good, added: "It makes you stronger and more beautiful too: Morning sex can strengthen your immune system for the day by enhancing your levels of IgA, an antibody that protects against infection.
"And it releases chemicals that boost levels of oestrogen, which improves the tone and texture of your skin and hair."
Other studies suggest that the benefits do not end there. A study at Queens University in Belfast found that having sex three times a week could halve the risk of heart attack or stroke.
Research from Nottingham University also revealed that men who kept up a regular sex life in their 50s were also at lower risk of developing prostate cancer.