You might think it odd of me

According to the religious edict issued by Rashad Hassan Khalil, a former dean of Al-Azhar University's faculty of Sharia, "being completely naked during the act of coitus annuls the marriage".

Suad Saleh, who heads the women's department of Al-Azhar's Islamic studies faculty, pleaded for "anything that can bring spouses closer to each other" and rejected the claim that nudity during intercourse could invalidate a union.

During a live televised debate, Islamic scholar Abdel Muti dismissed the fatwa: "Nothing is prohibited during marital sex, except of course sodomy."

Source: SMH