This project has initiated from the issue of gay men blood donation ban. Gay men in the UK are not allowed to donate blood unless they have had no sexual contact with another man within six months. However, the ban is not backed up by scientific evidence. Regarding this, many experts argue that the law is out-dated and discriminatory. It is a matter of sexual behaviours not of sexual orientation. For these reasons, the new type system has been created for gay men using LGBT coloured lines that connect transfusion IV.