A credit union is simply referred to as a financial institution that is created for the common interest of a particular group of people e.g workers in a company.
The members of the credit union are it's shareholders, depositors, and borrowers. Its features are that it's not for profit basis, it is subjected to lower taxes when compared to other financial institution. Its main aim is to meeting the needs of the members.
It's the other way around. Robert mapplethorne highlight gender roles that might be seem as unconventional for most of people. This could be seen in his photograph which put more emphasise on the feminine side that men have rather than the traditional masculine side.