OK, so I order a new bra on eBay. Nothing I've never done before.
A few days later, I get an email from the company saying my order has been delivered (to the mailbox). So, I go to the mailbox, get my bra and the rest of the mail, go home and try the bra on. It fits, great. One more for my small collection.
That evening my wife is looking at her phone and turns to me and says, "Did you order a bra from XXXXX Trading Company?" I reply "Yes, why do you ask?"
Well, the company sent me an email, but they also sent one to my wife. Why? We cannot figure it out. The best guess I can make is that at some point, she must have purchased something from the same company and some computer somewhere put the two names and emails together. My name is not normally associated with her email address in any way that I know of.
Fortunately, my wife knows I dress, wear a bra and boobs, etc. This could have been a big problem if she didn't.