Can a husband kiss the vagina of his wife? Can the wife swallow the semen of her husband?

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.

Swallowing the sperm is forbidden even according to the scholars who do not consider it impure. Imaam An-Nawawi said in Al-Majmoo': 'There are two opinions about swallowing sperm. However, the most correct opinion is that it is forbidden because it is filthy. Allaah says (which means): {And forbids them what is khabaa'ith (evil things, evil deeds, evil beliefs, evil persons and filthy food).}[Qur'an 7:157].'  The questioner should know that a person with a sound natural disposition and a sound taste would not be pleased with such a matter.

Allah knows best.