LEV232 It is a negative commandment not to be in close contact with consanguineous relations, even without conjugal intimacy as Scripture says, None of you shall approach anyone near of kin to him, to uncover nakedness [this verse] -- which means, for example, embracing and kissing, these being things that lead to "the uncovering of nakedness" [immorality]. If someone violates this and embraces or kisses [a forbidden consanguineous relation] or enjoys physical proximity with her, he should be given whiplashes, and is to be suspected of immorality. It is forbidden to wink or signal or play with them, or to sniff the perfume on them, or gaze at their beauty. One should do nothing that leads to improper fantasy; and it is forbidden to produce a seminal emission, this being a very severe sin. If someone deliberately brings on an erection, he is in a state of excommunication. It is a religious commitment by the Sages to marry off one's sons and daughters close to their age of maturity; for if he lets them be, they will be led to immorality or improper fantasy. It is forbidden to marry a woman to a minor, for that is like immorality. A young man should not marry an old woman, nor should an old man marry a young girl, as that leads to immorality. It is forbidden to be in private with a consanguineous relation, and it is also forbidden to be alone with a single girl. If someone is alone with a woman with whom he is forbidden to be in private, both should be flogged with whiplashes of disobedience, and their misdeed should be proclaimed--except in the case of a married woman. Then no flogging is given and it is not proclaimed, although it is forbidden to be alone with her -- so as not to give rise to slander about her children [that perhaps they are illegitimate].