Short answers, pulled from the story.
Oral sex involves stimulating genitalia using the mouth, lips, tongue, or teeth. Cunnilingus describes oral stimulation of the vulva while fellatio targets the penis. Anilingus refers to oral contact with the anus.
Risk of contracting HIV through oral sex is significantly lower than vaginal or anal sex. However, wounds on genitals or open sores in the mouth increase transmission chances for infections like Chlamydia and human papillomavirus. Brushing teeth or flossing shortly before performing oral sex can cause microscopic scratches that elevate infection risks.
Over half the teenagers questioned in a 2005 National Center for Health Statistics report had experienced oral sex. These statistics come from computer-administered surveys involving over 12,000 Americans aged 15 to 44 published in Time magazine on the 26th of September 2005.
Heterosexual couples may engage in oral sex for contraception reasons since sperm ingested by women gets broken down by stomach acids. Sperm cannot travel from the gastrointestinal system to the reproductive system in humans.
Ancient Romans considered fellatio profoundly taboo with sexual acts viewed through submission and control lenses. In contrast Chinese Taoism reveres cunnilingus as spiritually fulfilling with abilities to enhance longevity.