I really dont think that its the boys who are requesting the picture- its the mother!
People want know know why there is a shidduch crisis? Its because the boys’ mothers become psychotic when it comes to their sons dating. They make unreasonable demands, and expect a potential daughter in law to have all the maalos possible (Looks, money, education, personality…) And the sad part is that they actually have the power to demand all of these things, because they have a list of girls from here to Timbuktu that they can choose from. Mind you, they are the same people who are crying about the crisis when it comes to their daughters shidduchim!