MooseyMouse
Not a single one of your quotes was offensive, was it? We tend to assume 'normal' unless otherwise. We'd refer to someone with typically male features, dress and name as 'he'. We assume people are NT unless told otherwise. I'd offer someone a bacon sandwich if they were in my house and I was making one instead of assuming they wouldn't eat it (religious or vege.).
Would you assume that we banished the phrase 'husband and wife' and replaced them with life partners should someone be accidentally offended.
"Welcome to the NCT class. We'll split into two groups... Mums over there, dads over there and, oh, erm your partner can just pick whichever group she wants"
Using this as an example of a problem is particularly unusual. Of course there are two bloody groups. The ones pushing a baby out of their vagina, breast feeding, maternity leave etc and those supporting the former. Would 'baby carriers' and 'partners of baby carriers' be better? In this instance, assuming your partner wasn't pregnant, she should be with the Dads. If neither of you were you should both be.
You sound like you're looking for offence.
This is nothing to do with actual homophobia which I've witnessed, lost a good friend to and is an entirely different matter.
Barbara
Maybe she thought Julie from Finance was hot...