Might as well announce it on the PA system!

Aside from the fact that people see you walking around the store and up to the register with your unmistakable HPT packaging, no one says anything. It's a private matter, wanted or not, when it comes to pregnancy. 
Unless, if course, you have the cashier I had at Target this afternoon. She immediately congratulated me... Kinda putting the cart before the house, dontcha think? While I am TTC, what if it was an unwanted pregnancy? 
Maybe I'm moody, but I think it was extremely inappropriate for her to comment on it. Would she also tell me how her vagina doesn't like super plus tampons? 
Anyone else have nosey cashiers while buying TTC "supplies"?