I lived in the second gayest city in America for a good while and I wasn’t walking in on gay orgies. I don’t recall a single instance of gay public affection despite being outside often, but I also don’t recall any straight instances either because I don’t care about it. I have good success finding desirable partners and don’t hold feelings of jealousy or anything so any instances of PDA leave my mind because I don’t care about them.
It seems like either a personal problem, or a problem with lawlessness in general. Would you be happier walking in on straight orgies? Is that legal in Singapore? Seems wild that they’d allow that, but your post implies it.