Before the enforcement of the Hays Code, some cartoon shorts contained humor that was aimed at adult audience members rather than children. Additionally, the buttocks give an indication of the shape and size of the pelvis, which impacts reproductive capability. Such works have also often been subject to censorship and other legal restraints to publication, display or possession. Mutual masturbation, mutual manual stimulation of the genitals between partners, can be a substitute for sexual penetration. Being forced to wear diapers as a form of humiliation is sometimes a behavior encountered in sexual masochism. The mouth was the most common area to be ejaculated upon. The slave is usually strictly forbidden from placing their lips directly on the body of the dominant so the practice routinely involves them receiving much of the spray all over their face, hair and body, however, another way of doing this that applies mostly to male dominants, is to place the mouth on the head of the penis and drink the urine as it is released. While some fantasize about a giantess who is slightly hot gay sex taller than himself, others are interested in giantesses that are hundreds or even thousands of feet tall. This is commonly called double vaginal penetration or double stuffing. The industry generally refers to such films as adult films, which is milf fuck part of adult entertainment. It is also referred to as anal–oral contact and anal–oral sex, or colloquially as rimming or a rim job, and may be performed by or on people of any sexual orientation for personal pleasure or as a form of erotic humiliation. Contrary to the other two types, B/D does not define the Tops and Bottoms itself, and is used to describe the general activities with either partner being the receiver and the giver. Cartoon pornography includes, but is not limited to, hentai and parody renditions of famous cartoons and comics. The term breast fetishism is also used to refer to cultural attention to female breasts and the sexuality they represent, with debate continuing as to whether the modern widespread fascination with breasts among heterosexual males in western societies is a sexual fetish.