There isn't much in the way of MFM or MMF out there which is too bad. it's so niche. With porn searches the results for MMF run about 50% Bi sex. Over time words and terms take on new meanings. MMF doesn't necessarily denote Bi. Best to ask for "Bi MMF" as there isn't any ambiguity as to which 2 of the 3 are doing bi stuff. Further "Orally Bi Male" or "Orally Bi" is a term that describes a defined limit on Bi play usually involving handjobs, blowjobs and cock on cock contact and is not intimate focused soley on the cocks.