This publication provides an introduction to the subject of men and HIV/AIDS in relation to the work of UNFPA, carried out in partnership with UN agencies, governments and civil society organizations at all levels. As action intensifies, it will be important to recognize the positive and caring behaviour of many men, who do practise safe sex, treat women as equals, behave in non-violent ways and share in family care-giving. It will also be important to encourage the potential of all men to adopt more equitable, respectful and caring attitudes.