I get it, so I did a little web searching about the causes.
One train of thought is that lunch has a big influence. Too many carbs or an alcoholic drink can cause drowsiness, so there are tons of different diet tips to help prevent becoming sleepy.
Another reason is lack of enough sleep at night. That I can understand, but I usually get around 6-1/2 to 7 hours each night. Even with a lot of sleep, I still can get drowsy in the afternoon.
After the little research I made on the condition, I realized the suggestion of a nap was missing. Otherwise, doing what the body is demanding is not an option. I'm guessing this is due to the fact it's taboo in our society to sleep while at work. After all, just because every damn species besides humans will nap shouldn't be considered to be a sign that an afternoon nap is part of our genetic imprinting. We can't be so stupid as to think napping is healthy and necessary.
So, if you, too, get sleepy in the afternoon, don't worry. It's all part of being human, denial and gentics. Eat a good lunch, get enough sleep, avoid alcohol and ignore the feeling. We're too evolved to sleep when we're sleepy, unless it's when we're supposed to sleep.
In Case You've Wondered
My blog is where my wandering thoughts are interspersed with stuff I made up. So, if while reading you find yourself confused about the context, don't feel alone. I get confused, too.
If you're here for the stories, I started another blog: scratchingforchange.blogspot.com
One other thing: sometimes I write words you refuse to use in front of children, or polite company, unless you have a flat tire, or hit your thumb with a hammer.
I don't use them to offend; I use them to embellish.