Why would it cause a divorce?
Just ask her about it. Tell her u noticed her panties in the laundry. U never see her wear them. Just wonder if she wears them for someone else.
I know it sounds difficult. But honestly if guys just say "hay honey, are you interested in other men. Because if so I am secure enough to let u go try it!" There are two ways it will go. It's no or yes. Might take a bit if it's yes, but she sees you are willing to take a big step and talk to her about it. That u can be mature enough to put aside the "social correct" and discuss things openly that you have thought about.
It doesn't make any one a freak or pervert to their spouse about sex.
It's not that much different then admitting u like star wars or the cooking network.
Man or woman. If you love your spouse, then u talk to them. If they love u then they except your corky difference and everything is fine.
So many on here say oh she will never and I know her she would freak if I tell her. Guess what she can be thinking the same thing.
If u see something in the store that u really want and there is no price tag, do you ask the price? Did it kill anyone for asking?
Ask, discuss, don't badger! Things work out