OK so I've just started a series of very casual sexual relationships. I take safe sex very seriously and up to now have only engaged in intercourse using a condom. I would now like to start including oral which would obviously mean a condom on him and a dental dam on me. However I have absolutely no experience of using a dental dam. Where do I buy them and how do I use them. I am constantly hearing the sexual health clinics recommending their use but does anyone out there actually use these things? Any advice would be greatly appreciated. Sorry but you're gonna have to be quite specific about how to use them, I really have no idea. Thanks.