Is it normal that i want my wifes friend to dominate/humiliate me?

Why not have your wife spice it up a bit? Have her do a lot of walking, doing local errands say, wearing an old smelly pair of running shoes with no socks. Especially on a hot, humid day. Make it on a Saturday when she's off from work. Make sure she doesn't change her underwear from the previous day. And her fart a lot in them when she's alone in the car. I'm told that women do that a lot. Anyway, have her slip her sweaty,stinking feet into a pair of red high heels when she comes home from being out in the hot sun all day. Then have her order you to drop down on all fours like the spineless dog that you are and first chew on her sweat-stained, fart smelling panties. And then lick her sweaty, stinking feet and all the little gooey stuff gathered now between her toes, and then . . . Whew! Well, you can take it from there. Your welcome.

My hot older sister worked at a women's clothing store, part time, for years, and had a friend/coworker with killer, porn-length if not a bit more, nails, which are my fetish. Sister's nails were very long, too, and I had at them often. "Denise" (name change), the coworker and I would chat and joke around, and my brain would go to "Damn, I want her to tear into me with those nails until I bleed..Just want her to dominate the hell out of me with them". I couldn't look at her, or those hot nails, without pure, lustful desire for her to have her way with me.

The other thought was having them BOTH dig and rip into me, all 20 long nails making shreds of my skin until begging for mercy. I made some progress with Denise, but never had the domination event that I wanted..I'd do it today if could find her.

If your wife's OK with it, why not suggest to her she mentions your fantasy to her friend and see how she responds? However, keep it in mind that most fantasies are best kept as just that, because the reality may not live up to the fantasy.