hi is this your g/f or a street hooker? if its a hooker then don't od it if its your g/f and you have been with her for sometime and know a lot about her and if she has been sexually active with other men if not and your the only one things are good then then time to put your worries away and go for it. most women get good orgasms from oral sex once you get the hang of it but if like a lot of men sometimes we break the small piece of skin behind out tongue's its ok we all do it its just gets a little sore dose not mean you have an std. hope all the info helps. good luck
about having oral sex. i read that oral sex have risks if the partner have a certain disease like hpv . oki if the partner has no disease is it also safe without precautions or using specific barriers like condoms or dams? . also if the vulva look healthy i mean no infections symptoms appears on it is this a proof that the vulva is healthy and no diseases would be transmitted during oral sex? or only physician can decide that? . thanks in advance