Breast development extension adrenocorticotropic hormone (ACTH)), and thyroid hormones such as thyroxine (and by extension thyroid-stimulating hormone (TSH) and thyrotropin-releasing hormone (TRH)) also play permissive but less well-understood/poorly-characterized roles in breast development during both puberty and pregnancy, and are required for full functional development. Leptin has also been found to be an important factor in mammary gland development, and has been found to promote mammary epithelial cell proliferation. In contrast to the female-associated sex hormones, estrogen and progesterone, the male-associated sex hormones, the androgens, such as testosterone and dihydrotestosterone (DHT), powerfully suppress the action of estrogen in the breasts. At least one
Causes of sexual violence decreased the incidence of rape. Social learning theory of rape is similar to the feminist theory and links cultural traditions such as imitation, sex-violence linkages, rape myths (e.g., "women secretly desire to be raped"), and desensitization to be the core causes of rape. Rape culture is a term used within women's studies and feminism, describing a culture in which rape and other sexual violence (usually against women) are common and in which prevalent attitudes, norms, practices, and media condone, normalize, excuse, or encourage sexualized violence. Within the paradigm, acts of sexism are commonly employed to validate and rationalize normative misogynistic