A major curiosity, possibly the the point of obsession, with baby toys (especially extra soft/cuddly things and suckable/chewable things), bottles, baby food, playpens, and cribs all came before diapers for me as far as "stuff". I've never really felt that my diapers fall under "obsession". They're necessary (both physically from incontinence and emotionally), but definitely not what I recognized as something that I needed at first.