All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
Spouses can sleep naked and can see nude each other as we mentioned in our Fatwa 82530 and 87404.
There is no limitation in enjoying one's wife. One may have sex according to his ability as long as it does not cause harm to him or his wife. We advise you to consult any trustworthy doctor in this matter. For more information, please read Fataawa 90366 and 84944.
One may insert his left-hand finger in his wife's vagina but it is not advisable as we mentioned in our Fatwa 87972.
After childbirth one can not have sex with his wife before she has completely stopped bleeding. See Fatwa 81879.
Allaah Knows best.