Nations and tribes have their cultures individually but I think the weirdest I have ever seen are 2 different tribes in Nigeria.
Fulani are the craziest I think, they don't go to school they don't believe in western education all they do is rear cattle and get married at a very young age.
When ever a young lady is due for marriage probably at the age of 14 or 16 maximum all the lady admirer will have to fight to take the bride and it will be a weapon fight, some do lost their lives on the process and even the champion will be on treatment for weeks...... I see that as a big stupidity though, and that is about Fulani's.
Some part of Yoruba's In Nigeria once a woman marry them, the lady will have to sleep beside a very big python for the first night and the python will move around her body before the marriage is good to go and when ever the woman give birth she as well as the baby will also sleep beside the same python for a night and according to them if the baby is a bastard the python will sting and kill the baby.