A lot of people are recommending asking your doctor, and if you cant face the GP, go to a Sexual Health clinic. These are anonymous and really only need you to make an appointment or fill in a quick application. In fact just say your popping in to ask one question. You may even get your answer over the phone. They have heard worse. In fact when I went for a checkup once the range of questions they asked me (especially with the botty region), made my eyes boggle. In fact I started laughing and couldn't stop. If you wanna try it out the 100 percent safe way, get some cling film from your kitchen draw, the thinner the better, plonk it over her cheeks and lick away. Better still, whilst your in the bath with her squirt some antibacterial handwash on the starfish, scrub away, then you have at least an hour of fun which , although the taste may be a bit unpleasent, isnt worse then the 2 days bout of diaoreah I once got from trying it without cleaning it. Good luck and have fun.