I hate when someone makes plans with me and then, right in front of the person, asks me if it's okay if they come along too. Well, if it's not, am I really supposed to say so right in front of their face?! NO! So then I end up miserable spending time with someone I really don't want to, and I can't back out because it would be obvious why I was doing so! Ugh! Why can't people just ask me privately if it's okay if so-and-so comes along, so that if I do have a problem with them, I can say, "No, actually, I'd rather they not join in. Maybe you two could go and I'll hang out some other time."....So annoying.