Onania; or, The heinous sin of self-pollution, and all its frightful consequences, in both sexes, considered : With spiritual and physical advice to those, who have already injur'd themselves by this abominable practice. : And seasonable admonition to the youth (of both sexes) and those whose tuition they are under, whether parents, guardians, masters, or mistresses. : To which is added, a letter from a lady (very curious) concerning the use and abuse of the marriage bed. With the author's answer thereto. : [Six lines from Genesis].