Not surprising; bi guys aren't that well liked in the lifestyle and you'd really have to get to know a couple before they'd admit that hubby is bi.
I'm a rather well endowed fit man in the LS and I get contacted by many couples where the husband is bi or bi curious..Most seem to be older couples..Haven't met any in person as of yet as I prefer the young bi couples so I just wait for the right match..A lot won't tell you upfront they are bi as they aren't open with it and try to lure you in before telling you or some want to experiment privately..I'm DL bi so I get it, you have to coax it out of each other sometimes. But they are out there..My biggest fantasy is fucking pussy while sucking dick at the same time and Im definitely going to make that happen when the stars align