morning sex – Clinical psychologist and sleep expert Dr. Michael Breus says most couples end up having sex at the wrong biological time—often right before sleep between 10:30 and 11:30 p.m.—when key hormones and stress signals run opposite of what he links to better sexual
Most couples end up intimate at night. It’s an easy story to believe: you’re already together in bed, work is over, and the house is quieter. But sleep expert Dr. Michael Breus makes a blunt case that, biologically, bedtime sex can work against you.
In early May 2026. a clip of Breus arguing against late-night intimacy on the “Diary of a CEO” podcast drew nearly 1 million views on X. His point centers on timing: Breus says people are often intimate right before falling asleep—between 10:30 and 11:30 p.m.—yet their hormonal profile during that window is “literally the opposite” of what he says supports successful sex.
“You want to have estrogen, testosterone, progesterone, adrenaline and cortisol all to be high, and melatonin to be low,” Breus said on the podcast. “People actually have greater connection and greater performance in their sex when they have sex in the morning.”
Breus has been studying sleep for over 20 years, and the doorway into this conversation, he says, came from the overlap between sleep schedules and sex. “Once you start looking at sleep schedules, there’s basically only two things that you do in bed,” he says. “Sleep and sex.”
Hormones, stress signals, and the morning window
Breus ties his argument to how several biological markers shift throughout the day. Estrogen, he said, peaks in the early hours, promoting vaginal lubrication and increasing sexual desire. He also points to progesterone being highest in the morning. while adding that high progesterone—especially in the second half of the menstrual cycle—can suppress libido.
For men, Breus says testosterone levels peak in the morning, which he links to higher sex drive and performance. Across genders, he notes that cortisol peaks in the morning to help wake the body up. Adrenaline, by contrast, reaches its lowest around bedtime.
His reporting on couples trying morning intimacy goes beyond the lab. From conversations with couples, Breus said women often reported feeling more emotionally present and connected, having more energy to engage and initiate, and enjoying sex more overall when they shifted to mornings.
“With the men, overwhelmingly, they said they felt as though they performed better,” he said. “They also felt that their desire was moreso in the morning. That actually tracks very well with testosterone.”
The bigger complication: there’s no single best hour
Even with all that, Breus doesn’t claim there is one universal “best time” for everyone. His emphasis is on circadian rhythm—whether partners’ body clocks run on the same schedule, or at least overlap.
He recommends matching intimacy with each person’s chronotype, the term he uses for a person’s natural timing pattern. That can mean being an “early bird” or a “night owl.”
An early-bird may wake up early on their own, feel most alert in the morning, and get sleepy earlier in the evening. A night owl, by Breus’s description, struggles with early mornings, hits their stride later in the day, and feels more awake and social at night.
In his view, better intimacy happens when you sync sex with that circadian rhythm rather than simply fitting it into the calendar. For a true early bird, Breus says a 10:45 p.m. sex window may land in their biological “shut-down” phase. For a night owl, the same time might feel more natural.
What to do if schedules don’t match
For couples whose chronotypes don’t line up, Breus says the answer is to find overlap. He recommends identifying each partner’s chronotype and locating overlapping windows for intimacy.
In his book, “The Power of When: Discover Your Chronotype,” he shares tables with “compromise zones,” suggesting couples try a slightly earlier evening slot, or—when possible—a late-morning time.
Breus’s broader message is that timing governs more than mood. He describes a framework that stretches beyond intimacy into everyday decisions, saying he can point to the “perfect time of day” for multiple activities based on hormonal profiles and timing.
“Once you understand what your hormonal profile is, I can tell you the perfect time of day to have sex, eat a cheeseburger, ask your boss for a raise, email, drink coffee, drink alcohol,” he said. “And it’s all based on timing.”
Dr. Michael Breus sleep expert circadian rhythm chronotype sexual health hormones morning sex Diary of a CEO X