I've heard it with several women and I'd go as far to say it's 50/50 if you include the women who feel it but don't admit it because of their traditional or repressive upbringing.
I reckon women being attracted to two men getting it on is as common as men being attracted to two women getting it on. Women who find men on men attractive are probably turned on for the exact same reasons that men are turned on by women on women.
I reckon women being attracted to two men getting it on is as common as men being attracted to two women getting it on. Women who find men on men attractive are probably turned on for the exact same reasons that men are turned on by women on women.