If you where born left handed then learn how to abide b the usage of your right hand in some cases.

Marriage is based on love and never compulsion.

Guys don’t give drinks to ladies. Nothing like that is done during introduction, only during traditional marriage in Igboland, I don’t know much about yoruba culture.

if you are left handed – Then, that is your right hand. Most elderly people feels it’s disrespectful to stretch out your left hand to them: mostly among the Yoruba’s.

Not really, you can if he is your husband or father. Sometimes it’s just to show respect to the elderly, both men and women are called daddy and mummy.
Like I am sitting in the bank while an elderly woman is standing, I could walk up to her and say, mummy, come and sit even when she is not my mum.