What is the ruling on a wife sucking her husband's penis, and a man licking his wife's vagina from the inside when some impurities are being discharged?

It is permissible for spouses to enjoy each other's bodies, as Allah Almighty says: (They are clothing for you, and you are clothing for them) and His saying: (Your women are a tilth for you, so approach your tilth however you wish), while observing two matters:

1. Avoiding prohibitions: Approaching a woman in the anus. Approaching a woman in the vagina during menstruation or postpartum bleeding.

2. Observing Islamic manners: Sucking or licking the organ has no explicit textual evidence, but it goes against refined manners and sound human nature, and it is safer to avoid it. It may lead to touching and swallowing impurities, which could cause diseases. It is not strictly forbidden unless the impurity mixes with saliva and reaches the throat.