You'll note that the male pregnancy ends with an orgasm, while the female pregnancy ends with hours of labor. This proves that life isn't fair, and class is now dismissed.
"This is BULLSHIT!"
So Why Do They Believe It?
If we're going to look at these weird-ass beliefs from various cultures around the world, we should take a moment to figure out why anyone believes them. After all, most weird beliefs exist because, well, they work.
In this case, it solves a problem that the actual scientific understanding of pregnancy brings: that the responsibility for a pregnancy is on the woman alone. Women have to take prenatal vitamins, avoid alcohol, eat responsibly, give up smoking ... while guys could squirt and bolt, and it wouldn't affect the baby one bit. Physically, anyway. Whereas the Malay belief says to the man, "You also carried this baby for over a month."
And after so long, it just doesn't fit back in. So no refunds.
The man is said to even have cravings during his part of the pregnancy, just as his wife does after he passes the baby to her. And after his 40 days are through, he's still involved in the fetus' well-being -- he's not just moral support, but actually part of the pregnancy. Malay pregnancy rituals require just as much fastidious behavior from the man as from the woman. That's right: There's no wham, bam, thank you ma'am in Malay pregnancies. Instead, it's baby-making as a team effort. It's almost sweet, in a bizarre brain-baby sort of way.