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 Causes of sexual violence Causes of sexual violence are debated and explanations of the cause include military conquest, socioeconomics, anger, power, sadism, sexual pleasure, psychopathy, ethical standards, laws, attitudes toward the victims and evolutionary pressures. Clinical psychologist Nicholas Groth has described several different types of rape. A detailed conceptual analysis shows that objectification might underlie denial of agency and personhood that leads to rape. The goal of this rapist is to humiliate, debase and hurt their victim; they express their contempt for their victim through physical violence and profane language. For these rapists, sex is a weapon to defile and