B cells are a specific type of white blood cell called a lymphocyte. Other types of lymphocytes include T cells and natural killer cells. B cells develop from stem cells in bone marrow. They remain in the bone marrow until they become mature.
Infantile behavior is something the masses are taught to exemplify since childhood. As adults they (mostly Betas) are encouraged to have sexual relations with multiple partners.
paraphilic infantilism. A sexual fetish in which the participant role-plays regression to an infant-like state by drinking from a baby bottle, sleeping in an oversized crib, playing in a playpen and wearing diapers.