Yep...we have that issue here too!
In fact, Mojo and LilyGrace are so use to getting packages in the mail, they go crazy whenever we get a box...they think it is for them.
I have a few boxes, bags on the floor in the office and they are both constantly sticking their heads in there to see what is for them.
Of course, they have goodies in there too....for Valentine's Day!