I know five boys who had vasectomies while sleeping around in college and wanted it reversed when they became men. Only one had a successful reversal and the reversal cost him thousands of dollars. The people, in their best interest, will at some time need to step in and prevent or limit vasectomies.
Doctors shouldn't do vasectomies unless the man is 40, or he has at least 2 children or some sort of medical and/or mental issue.