Four Popes have died while participating in sexual acts
1] Pope Leo VII (936-9) died of a heart attack while having sex.
2] Pope John VII (955-64) was bludgeoned to death by the cuckolded husband of the woman he was having sex with at the time.
3] Pope John XIII (965-72) was also murdered by an irate husband during the act.
4] Pope Paul II (1467-71) allegedly died while being sodomized by a page boy.
Source:
http://en.wikipedia.org/wiki/List_of...y_active_popes