I also have friends who were labeled "sissys" and "momma's boys" growing up. All are heterosexual.
Me too. One boy at our school used to hang out with girls all the time, joined all the Catholic rosary groups (that was technically allowed for boys - except none but he ever did), and also took sewing and needlework as his "electives."
I do not know how he dared. You cannot imagine the pressure to conform in an Australian rural primary school.
However, he had character. When he was doing sewing or knitting, it didn't look feminine at all, as he glared at the needles with fierce determination. He just shut out a lot of things - wouldn't reply to people unless he felt like it.
I suppose now he would be sent for some futile counselling and observations sessions - where, incidently, they wouldn't let him withdraw into himself and would badger him to death about gender issues. At school, our teachers just let him go his own way.
The last I heard, he was doing very well, and had a high position in a British museum. He became an expert on textiles.