hi, I went to a massage parlor in Singapore. I was asked to take off my clothes completely and lie on my stomach. The masseuse then climbed onto my back and rubbed my body with her hands and knees. She also rubbed areas close to my anus. She was wearing a short dress and I am not sure if she had any underwear on. I am worried about her vaginal secretions getting into my body thru my rectal area. Please advise on risk factor for HIV. I am anxious.