I think I would only know if they did the limp wrist, high voice, roll the eyes bit.
Luckily I don’t ‘seem’ to know any in recent years. Many years ago I knew one who ran across the field to give me a ‘hug’ when I was teaching Physical Education. Everyone knew he was, lol.
.
Many homosexual &/or bisexual men will not always have the obvious blantant styles and movements and vocal traits that has become a tradmark in Than Franthisco or Fire Island
But any women can spot them instantly