It’s not MY problem, it’s the problem of many supporters of gay marriage and gay relationships ( yes, it includes those who attend synagogues and churches ).
The want to nuance (or “equalize”) things by insisting that the prohibition against homosexual sex is SIMILAR to the prohibition against heterosexual sex.
And since the instance mentioned in the Genesis passage talks about the men of Sodom wanting to gang rape the strangers, this does not apply to gays today because they don’t want to rape anyone.
Therefore, if you allow gays to marry, the prohibition is gone.
[not my argument, just telling you what I’ve been encountering when I talk to some people ]
Heterosexual sex is forbidden only in the case of a woman married to another man or within certain degrees of kinship. There is no such thing as "premarital sex," since sex between two eligible people Halakhically constitutes marriage (making any further sexual acts by the woman with other men acts of adultery, which is also a capital offense).
It's a shame so many people are so ignorant of G-d's Laws.