I also work at a baby store and male custy's (and sometimes custy grandmothers) have said similar things to me in the past. They'll ask me if I have kids (I don't) and they look at me like I have some sort of social disease.
One asked how old I was (I stupidly told them) and he flat out told me that if I waited any longer, I was never going to have any. Then proceeded to tell me all about his sons, their ages, and the babies they have. I'm 30 and I guess that makes me an old maid apparently!
Well, excuuuse me for wanting to wait until I'm married and can also afford a child! I work in retail for crap's sake!
By the way, I'm not claiming that not being married and having a kid is wrong at all. That's just my plan for when I pop another human into the world.
--K from MA