I think people say things like that because they just don't know what else to say kwim? Drive you nuts but they just can't not say anything so they just say the first stupid thing that pops into their heads i reckon LOL.

Seriously, if you saw me waddling towards you when I was 40wks pg with Alister, you'd have thought I had a 15 pound baby in there - I was HUGE! instead he was just over 10lb LOL.