IIRC all I know about Grinder aside from the fact that it's probably the most popular dating app among gay men is that there's a location sharing feature which allows you to see where potential matches actually are in proximity to you.
This would of course never fly with a straight app because women would rightly feel at risk, as they have to put up with enough creeps on those apps without having them know their location. But gay guys are happy to share their location in the hopes of finding a boy toy who's DTF within walking distance, which I think is hilarious but has gotta be awesome if you're a promiscuous gay dude hunting for some convenient cock.
Speaking of Judas Priest, I recently listened to their "Sad Wings of Destiny" albums because a friend of mine told me it was one of his all time favorite albums and though it was predictably not my cuppa tea, it was probably the most well-executed example of hair metal I've ever heard (singing, musicianship, production and songwriting were all noticeably a cut above what typically passes for the subgenre, though I'm obviously no expert). I also thought they sounded a lot like Queen at times (and no, not just because the singer is gay)- is that a common opinion?