Halakhah sur Amos 4:13

A man should not act with levity with his wife, nor should he degrade his speech with nonsense, even between him and her. The verse says, "He tells man what his speech is" (Amos 4:13) and the Sages comment, "Even light conversation between a man and his wife will be brought to judgement in the future." He should not speak with her during intercourse, nor before it, lest he direct his thoughts to another woman. If he does speak with her and proceed immediately to intercourse, about him the verse says, "He tells man what his speech is". He may speak about matters pertinent to the intercourse, to increase his desire, or if there was strife between them and he needed to appeal to her and appease her, he may speak with her to appeal to her. Rem"a: He may do with his wife whatever he wishes. He may have intercourse whenever he wishes, he may kiss any part of her body that he desires, he may have vaginal [typical] or anal [atypical] intercourse, or stimulate himself with other parts of her body, so long as he does not ejaculate outside the vagina (Tur). Some authorities are lenient and say that he may even ejaculate during anal intercourse, if it is occasional and not his habit (Tur). Even though all of this is permissible, anyone who wishes to sanctify himself [by abstaining] from the permitted is called holy. He should not have frequent intercourse so that he is always with her, for this is extremely detrimental and it is the way of boors; it is meritorious to minimize intercourse, only keeping to the minimum required by marital obligations. Even when fulfilling marital obligations he should not focus on his pleasure, it should instead be as on paying back an obligation, for he is obligated in marital duties, and to fulfill the mitzvah of being fruitful and multiplying, and to have children who study Torah and perform mitzvot for the people of Israel. He may not have intercourse without her consent, and if she is not interested he should appease her until she is interested. He should be very private during intercourse, having no people of any kind around, even a child, unless it is a baby who cannot speak.