The question came up if pictures like those
post #248080 post #387301
are counting as straight or bisexual.
123Easy brought in the following point:
....I'd leave straight or bi out of it, because unless all characters are interacting with both other parties in the image, we can't really tell. I mean, two guys fucking one girl could just really like the one girl so much they don't care about other guys' cocks... or they might not have any sort of attachment to the social more of not fucking the same girl as another guy. Same for two girls on one guy- they could be his wives in a poly relationship, who love him but don't make love to each other.
So the question is do we need a new tag for this or not?
If yes, Easy suggested shared_partner.
Updated