Issues relating to sexuality, marriage, and parenthood of mentally retarded people are discussed in the context of normalization. Negative attitudes towards the manifestation of sexuality by mentally retarded people are considered, along with studies which demonstrate that many such individuals are capable of meaningful sexual behavior, and meaningful interpersonal relationships that may culminate in marriage and child rearing. It is urged that counselors have an impol'tant role in assisting mentally retarded individuals attain their rights to sexual activity, marriage, and parenthood. Attention is drawn to teaching techniques for use in sex education programs for mentally retarded people, and examples are presented of programs which deal with psycho-sexual development, marriage, parenthood, and sexual problems and dysfunctions.