I often think of the Oxford/Cambridge philosopher G.E.M. Anscombe. (Yes, I really do.) In her time, she struck people as pretty dyke-y. Wore pants. Butch hair. Smoked a cigar. Was not conspicuously feminine in social, emotional and intellectual style. Student of, and intellectual collaborator with, Ludwig Wittgenstein, who was (people thought) obviously homosexual.
But Anscombe was a believing and practicing and very traditional Catholic, advocate of chastity, anti-contraception, faithful wife of philosopher Peter Geach, mother of 7.
Sometimes you just can't tell.