Theory —

It’s more natural to have sex first thing in the morning while you’re 100% physiologically rejuvenated, than at night when you’re tired?

The theory—

To produce a child is very expensive physiologically, and to have sex first thing in the morning ensures peak power.

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Research

Results: TT levels measured in blood drawn from 8 to 11 AM (n = 229) differed significantly from those drawn outside this window (n = 442) (411.7 vs 368.3 ng/dl; p = 0.0003). Differences in TT levels were evident across five blood draw time windows (p = < 0.0001) and persisted after adjustment for age and BMI. TT levels in blood drawn from 2 to 5 PM (344.3 ng/dl) and 5 to 8 PM (334.4 ng/dl) differed significantly from that drawn from 8 to 11 AM (p < 0.05), while TT levels from 11 AM to 2 PM (396.5 ng/dl) and 8 PM to 8 AM (373.4 ng/dl) did not (p = 0.90 and 0.73, respectively).

ChatGPT 4:

This excerpt describes the findings from a study examining the variation in total testosterone (TT) levels in men based on the time of day when blood samples were taken. Let’s break down the key points for clarity:Study Design and ParticipantsThe study involved comparing TT levels in blood samples taken at different times of the day.Samples were collected from 671 men, divided into two main groups based on the timing of blood draws: those drawn between 8 to 11 AM (229 samples) and those drawn outside this time window (442 samples).Main FindingsDifference in TT Levels Based on Time of Blood Draw:Blood samples taken between 8 to 11 AM showed significantly higher TT levels (411.7 ng/dl) compared to samples taken outside this time window (368.3 ng/dl), with a statistically significant difference (p = 0.0003). “p-value” indicates the likelihood that the observed difference is due to chance; here, a value of 0.0003 suggests a very low probability, implying that the difference is statistically significant.Variation Across Different Time Windows:The study further categorized the blood draw times into five windows. It found significant differences in TT levels across these windows (p < 0.0001), indicating that the time of day has a substantial impact on TT levels.Specific Time Window Comparisons:Blood samples taken from 2 to 5 PM (344.3 ng/dl) and from 5 to 8 PM (334.4 ng/dl) showed significantly lower TT levels compared to those taken from 8 to 11 AM. This suggests that TT levels decrease as the day progresses.However, TT levels in samples taken from 11 AM to 2 PM (396.5 ng/dl) and from 8 PM to 8 AM (373.4 ng/dl) did not show a significant difference when compared to the 8 to 11 AM samples (p-values of 0.90 and 0.73, respectively). This indicates that while there is a trend of decreasing TT levels after the morning peak, the decline is not linear or uniform across all time windows.Adjustment for Age and BMI:The observed differences in TT levels remained significant even after adjusting for potential confounding factors like age and Body Mass Index (BMI). This strengthens the argument that the time of day independently affects TT levels.ConclusionThe study’s results underscore the importance of the time of day in measuring TT levels in men, highlighting a significant variation in levels based on when the blood samples are taken. This has practical implications for diagnosing and treating conditions related to testosterone levels, suggesting that timing should be considered to ensure accurate assessment and treatment planning.

Morning vs Night sex

The preference and performance for sexual activity at different times of the day, such as morning versus night, can vary widely among men, influenced by physiological, psychological, and lifestyle factors. Here are some considerations:Morning:Testosterone Levels: As mentioned, testosterone levels in men are typically highest in the morning. Since testosterone plays a crucial role in sexual desire and function, this could mean that some men may have a stronger libido and potentially better sexual performance in the morning.Physical and Mental Refreshment: After a good night’s sleep, individuals often feel more rested and energetic. This rejuvenation can contribute to a higher willingness and capacity for sexual activity.Stress Levels: For many, stress levels are lower in the morning after a rest, before the day’s worries and responsibilities start to accumulate. Lower stress can enhance sexual desire and performance.Night:Emotional Intimacy and Relaxation: Evening or nighttime is often when people have completed their daily tasks and can relax. This downtime can facilitate emotional intimacy between partners, which is a significant component of sexual desire for many individuals.Privacy and Opportunity: Especially for people with children or busy schedules, night might offer more privacy and opportunity for uninterrupted intimacy.Cultural and Social Norms: Societal norms and routines may also play a role in shaping preferences for nighttime sexual activity, as evenings are traditionally viewed as a time for privacy and relaxation.Individual Variability:Lifestyle and Schedule: Personal and professional schedules can heavily influence when individuals feel most inclined or have the opportunity for sexual activity. Shift workers, for example, might have completely different patterns compared to those working standard daytime hours.Age: Younger men, who typically have higher testosterone levels, might not notice as significant a difference in libido or sexual performance between morning and evening as older men might.Psychological Factors: Mental health, stress levels, and emotional state can also affect libido and sexual performance significantly, independent of the time of day.Ultimately, the preference for morning versus night for sexual activity is highly individual. Communication between partners about preferences, desires, and schedules is key to a fulfilling sexual relationship.