If husband and wife are both agreed then are they allowed to do anal sex or is it haram according to Ali Khamenei?

Shari'a rule for intimacy with the wife from behind is:
Aystullah al udhma Imam Khomeini, Khamenei, Safi Gulpayegsni, Makarem and Nouri: "It has a strong disgust". (Ayatollah Nouri, Taqf al-Masal, p. 452; Imam Khomeini and Ayatollah Safi, Taqf al-Masal al-Marjah, p. 450; Ayatollah Makarim, Suznat al-Aruwa, Haqam al-Hayd, p. VII and Ayatollah Khamenei, Isftaa, p. 425)