Men and women may masturbate until they are close to orgasm, stop for a while to reduce excitement, and then resume masturbating. Fisting pornography features the insertion of an entire hand into a performer vagina or anus. Real jail or prison or police station shots or videos may violate laws in some countries. Group sex can occur between people of all sexual orientations and genders. The Japanese sex industry uses the term Paizuri . Shemale is a term primarily used in sex work to describe a trans woman with male genitalia combined with female secondary sex characteristics, usually including augmented female breasts, from breast augmentation and/or use of hormones. With second wave feminism and growth of scholarship in women history and sexuality in the 20th century, the definition of lesbian broadened, sparking a debate about sexual desire as the major component to define what a lesbian is. As with most milf fuck forms of sexual activity, anal sex participants risk contracting sexually transmitted infections . The term hentai is never used in this context in Japanese. It may be used as foreplay, or as an alternative to sexual penetration. Well-known female porn stars who expressed their pleasure in pegging their male partners include Taylor Wane, Debi Diamond, Brittany Andrews, and Monique Covét. There is also some evidence that pornography can be used to treat voyeurism. A pearl necklace is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, chest, or breast of another person. Rape itself is a crime in many countries. Often a dominant woman, she may be called a Dom, Domme /ˈdɒm/, Femdomme, Domina, or Dominatrix, depending on context or personal preference. A common way that these are depicted in a single scene is with one woman and two men performing together. Some couples use a threesome gay cock as a way to develop a love 3d hentai triangle . Bareback sex is physical sexual activity, especially sexual penetration, without the use of a condom. Bobbi S.