Q. What are the consequences for someone who's a lesbian / gay / bisexual / queer etc.? Explain this in an aspect of Buddhism.

A. They are already experiencing the consequences of previous lives having such a mindset and/or body (part). There is every chance that those (mindsets and bodies) will continue even if they reborn among humans (most probably they will be reborn in the four woeful states / one of them). Although they are/may be thinking “we are living in a heaven” (on one hand – indeed they are; on the other hand – their ill-mentality makes them think so), they are really living in a hell (their ill-mentality converts a heaven into a hell). Only a Healthy Mind can imagine that being mentally and/or physically ill or abnormal condition(s), what (a shit) kind of life there are having.

Further, they will suffer from sexual-related and genital illnesses (and abnormalities), having many enemies, having many (mental and/or physical) illnesses, getting undesirables wives / husbands, (re)birth continues as a woman or as a eunuch, bisexual person, etc. not only in this life, throughout samsaric lives also.

[N.B. All above consequences are hindrances to have a healthy-peaceful-humane life in this birth and the next and also samsaric ones and eventually to Liberation.]