Maybe They Can Use A Sheet With A Hole In It

Check out this debate:

According to ... the religious edict issued by Rashad Hassan Khalil, a former dean of Al-Azhar University's faculty of Sharia (or Islamic law), "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" ...

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

See http://www.smh.com.au/articles/2006/01/09/1136655112299.html?from=top5

According to world-renowned Jewish Studies Professor Elaine Goodfriend, however, the notion that religious Jews have sex through a hole in a sheet is a "myth."