many wimmin get thrown off by any mention of weight gain. i have a couple of wimmin friends who like to argue politics among other things <i think wimmin just like to argue>.
when they start to get out of hand, i'll make a comment about weight. like-when did you change your clothes style to such tight fitting outfits. of course it's not, but they start looking down and around at their clothes.
the best one is-
<me> hey i just noticed, congratulations!
<she> what for?
<me> aren't you pregnant?
that one always get them
am i evil too?