I've been aproached by gay people and got anoyed but what you can do, they tried their luck.
LOL.. that would have been awkward, for sure. I have been never approached by any lesbians, although there are quite a lot of them here. Perhaps they must have noticed that I am happily married with kids. But if some of them approaches me, then I would politely decline them (as long as they are not too rude or forceful).
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