Hello Equimum I'll pm you, otherwise this post could become an essay.
lazza I really understand where you are coming from. I sort of wish DS had been a girl because he is the only "heir" and I know that makes the PIL ridiculously happy but makes me really uncomfortable IYSWIM. We also made be mistake of letting him have DP's surname
it's not a massive issue but its those little comments that really stick isn't it? Oh and I always get comments like " you can still BF???" Although I'm almost there with just giving DS bottles. He gets a little bit of boob time at night but I don't think it will last much longer. I will kind of miss it but often when he has had enough to drink he won't give up the nipple. It's odd how babies liked to be comforted so differently. Of course, it's the same as how they do everything differently but you know what I mean :)
And I love the idea of a vegetarian wedding, and the slippers. Just for comedy value. If I can perhaps I'll just find a really dry humour way to say - in German - that "we were thinking about making it into a roller disco but we were worried about DS/small children getting hurt so we thought handing out slippers would be good. Except that would be impractical too because we would have to know everyone's shoe size and outfit colour" 
I'll let you know if your suggestions are more ludicrous than their assumptions.
And we bought DP's suit today. He looks soooo sexy in it :) love him!