While catching up on reading some good wholesome Christian literature this morning I came across this ...
http://www.sexinchrist.com/threesome.html
?Although two men having simultaneous sexual relations with one woman may not have any overt homosexual contact between them, the act of sharing a woman and being together in a sexual situation is nevertheless homoerotic and suggests implied homosexuality, as well as presenting a temptation to experiment where one may ordinarily not. For this reason, we feel it is best for a couple to avoid bringing another man into the picture.?