I still don't get this fetish

Going off another post earlier today, I still don't get why TF arouses me. I blame commercials from the 90s/2000s and some books/tv from that era too. But the thing was I didn't know this was a kink till I hit puberty. Granted, the tf I like most became a kink when it got crossed with my existing bellybutton fetish, which I also don't get lol. But idk if it's the aesthetic or the human hybrid tf aspect, I just like it. For example, the idea of a woman transforming (mostly her head) while wearing a bikini, lingerie or crop top seems sexy to me. Make it make sense!

Also, do you think this is mostly a millennial thing? Especially since TF was big in the 90s and 2000s?