My baby feeding her baby (doll)

Liliana will be 2 years old at the end of this month.  Today she sat down to feed her baby doll.  She fed her with a bottle.  It was really cute, but made me kind of sad.  You see, when Seamus and Sofia would feed their baby dolls, they would pull up their shirts and nurse them!  Ha!  Talk about cute!  Sofia watched me breastfeed Liliana and Seamus watched me breastfeed both girls.  So, to them, of course that's how they're going to feed their baby dolls!  But, Liliana is our last and she has never seen me nurse, so she only knows how to feed a baby from what she sees in cartoons.  So, I was a little sad today for two reasons.  One, my littlest is growing up.  And, two, it's a shame they don't show ALL the ways you can feed a baby on TV.