IIN to get turned on when my wife wears revealing clothes in public?

If you want your wife to sleep with countless other scumbags then SURE.
If you like group sex with your wife then OF COURSE.
If you don't mind kissing her lips after she's done blowing some other guy off then You're A-OK.

In general, i believe you - are a scumbag.

But either way - Yes, it is normal.
You are about as typical as any other predictable male on this planet, congratulations with being a clone!