What are the best ways to subtlety drop hints that you are gay or bisexual?

I want people to know without me having to "come out" to every person I want to get in a relationship with or have a real friendship with. Everyone assumes I'm straight and I want to know from the beginning the people I'm trying to form friendships and relationships with aren't going to reject me for being bisexual.
What are the best ways to subtlety drop hints that you are gay or bisexual?
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