Assalam-o-Alaikum wa Rehmatullah wa Barakatuhu, brother asAs far as I have been with scholars and studied the Qur'an and Sunnah I have not come across any such particular 'reason'reason for going into Polygamypolygamy. And Allah has said in the Quran [4:3]:
"thenthen marry those that please you of [other] women, two or three or four. But if you fear that you will not be just, then [marry only] one or those your right hand possesses. That is more suitable that you may not incline [to injustice]." [4:3]
You may like any girl, whilst you are married, and so you can marry her too. Or that you like to support someone, so you may marry her. Or there can be any reason for marrying, from most stupid to most intellectualbe it wise or not. Islam has allowed a Menmen to have at max 4four wives at one time, and there are no prerequisites attached to it. But MAKE SURE TO PROVIDE THEM THEIR DUE RIGHTS EQUALLYbe sure to provide them their due rights, OR NOBODY ELSE WOULD EVER BE ABLE TO SAVE YOU FROM ALLAH'S PUNISHMENT....
May Allah's peaceelse nobody would ever be upon Allable to save you from Allah's punishment.