Getting horny from other body parts?

So I watched a foot fetish video(Note: only answer if you can help or know something similar to this please), which is basically foot worship, massage, kissing, sucking, and licking. It turned me on, but now I literally feel my foot get all sensitive and throbbing, like it gets aroused lol like I want someone to lick and suck my foot. Is it normal? And have you experienced getting aroused in a different body part that isn’t sexual, not from your vagina, boobs, or anus?