Ever sat a robot crowded with street vendors? Notice how they stand there not bugging you? But the second you look at one, he comes running to your window... The trick is to not make eye contact and they just may pass you by...
Something similar happens here. There are a few (or many) profiles with two bi males and the profile is that of a couple. When these are under your "suggested profiles" list, it does not say what gender the parties of that couple are. The name or distance grabs your interest, so you click it and the profile opens to reveal that the couple is actually two men, so you do not contact if you not into "guy only fun"... But when they log on, it shows who has viewed their profile, and you pop up on that list cos you opened the profile... Now the messaging starts because they believe you are interested... Why else would you view their profile? Er, maybe because you did not know that the couple is actually two men??