If You do not feel comfortable about doing this then there is your answer basicly. I am a sub and was/am chaser and had guys asking me regularly for yeats to poz them. My answer is i am sub and it just is not what i am about. Happy to play but not with the aim to specificaly poz them. I have sometimes engaged a few into some indepth discussion as to have they given real thought to what may happen in various ways,the sti'sand Hepatitis that may easily also be contracted too. Then the possibilities of severe illness that can last for months and not just a bit of a flu type illness. I myself was severely ill for 3 months with the conversion sickness. 9I never expected that and took me totaly by surprise and was pretty horrific so bad almost hospitalised and 3months of hell. I usualy find after talking about those issues that most are put off and had not given very much serious thought at all to any of it. THerefore maybe you could try raising those issues too and see what happens. Either way you have no need to do anything you dont enjoy or feel good about.