Answered on Quora.
It sure seems gay. I would never send a kissy emoji to a male unless I was pretending to be gay for a gag.
Straight men don’t kiss men. When you send a kissy to a man, you are either kissing him or blowing him a kiss. They both sound rather gay to me.
There are some straight men out there who kiss guys who they are close friends with. It is a straight up peck on the lips, not a deep kiss. I don’t get it, and I wouldn’t do it if you paid me, but these men are not gay.
Why do it? There are lots of smileys, winks, thumbs up, etc. you can send instead.