Hahahaha..
I actually like this phrase IF (and this is a big IF) the bloke 'acts' as though he is pregnant..
Say I change my mind (highly, highly unlikely) and decide to get preggers... Riiight, so that means no alcohol for 9 months.. certain other foods are off limits.. obviously no smoking ... and I won't be able to go on planes past a certain time... no late nights in the pub or anywhere with smokers...
So... if my partner agrees to not drink for 9 months, comes to all my weird pregnancy appointments etc.. then sure, 'we' are pregnant...
However, I would say most men like saying 'we' are pregnant as they feel more ownership on the situation 'we'll decide if we go ahead with this pregnancy'.. er no, sorry mate.. womans body.. womans choice... 'we're pregnant' .. erm.. well technically 'she' is pregnant ...
The amusing thing is... when the woman is sat at home, really huge .. how many times will the guy be there with her? how many times at parties will the guy get his pregnant wife an orange juice and have a beer himself? oh riiiight, so 'we're pregnant when it suits the guy.. but 'she' is pregnant when it doesn't...
I swear.. Mr Linux would be tea total and be at home after work every single day if I was... and if he did decide to drink I would probably try and match him just to make a point.
'we're pregnant' = 'we go through everything together, including the [censored] bits'...