Have you ever noticed how guys tend to be more helpful in the morning than in the evening? Or how they are more agreeable about your suggestions in the middle of the afternoon than at any other time of day?

According to Gabrielle Lichterman, founder of the Hormonology Blog and author of 28 Days: What Your Cycle Reveals about Your Love Life, Moods, and Potential, a book which postulates that "your hormones affect virtually every aspect of your day," it’s because men, like women, are not immune to mood swings. They too are affected by hormones, though not necessarily in the way you think. Luckily, guys are predictable in this sense.

LATE-MORNING HELPFULNESS

According to the health journalist, men are more helpful at from around 9:00 AM to 12:00 PM because this is the time when there is a burst of testosterone in their system, making them feel more heroic. If you need help with painting a room in your house, for example, use this three-hour window of opportunity to ask your guy to help out. Throw in a few compliments here and there about his ability to make art with any canvas, and you’ll find that chore done in no time.

MID-AFTERNOON COOPERATION

Since guys are affected by the highs and lows of hormonal levels multiple times a day, they’ll have another change of mood soon. At around 3:00 to 4:00 PM, guys tend to be more compliant, more open to accepting what you say. Their low testosterone levels make them feel mellow, and they become putty in the right woman's hands. If you want your guy to accompany you dress shopping, for example, now would be a good time to broach the topic.

GETTING THAT EVENING LOVIN' FEELING

At around 8:00 to 10:00 PM, guys should have oxytocin running in their bloodstream. Oxytocin is known as the love or cuddle hormone, so you can just imagine how much sweeter he’ll be than usual. Still not talking after your lover’s quarrel at a family reunion? Now's the best time to make up. Plus, this way, you won't be deprived of a good night's sleep or go to bed angry.

For more insights into the male mind, check out our Guy Talk articles:

• Top 10 Things That Turn Guys On
• 10 Things That Turn Guys Off
• 20 Flirting Moves That Work

For tips on managing your own moods and figuring out your best hours, try these:

• New Study: Research Shows Happiness and Sadness Are Infectious + 10 Small Ways to Spread Joy
• New Study: Crying Doesn't Make You Feel Better
• The Best Time to Do Everything: 24 Tips for Managing Your Time Efficiently
• What's your perfect time of day?

(Photo by trublueboy via sxc.hu)