What is the ruling on investing in a company that produces pillows used to aid sexual positions or masturbation, and is the profit from it lawful? Does the ruling differ if the money is a loan to this person to help him financially?

It is permissible for married couples to use the aforementioned pillow for enjoyment, but it is forbidden to use it for masturbation. Manufacturing and selling it are permissible if its predominant use is by married couples. However, if its predominant use is for forbidden purposes, then manufacturing it is not permissible. The ruling on investing money in its manufacture follows this: it is permissible where manufacturing is permissible, and forbidden where it is forbidden. If investment is forbidden, it is permissible to lend money to its owner unless you know or predominantly believe that he will use the loan for forbidden manufacturing, in which case lending is not permissible due to aiding in sin.