I read the article too but I think before you panic you should talk to your DP. If his initial reaction is to guffaw and say "what kind of neanderthal to do think I am?" then you are probably pretty safe But I would suggest that if he says anthing like "well, I have kind of been thinking about that..." or "well, I don't think there will be any issues, but..." then maybe you need to look into it further.
Basically, a lot of guys (apparently) can have all sorts of issues with seeing the head come out because it makes then feel inadequate, size-wise IYKWIM? And still others can have issues where as soon as you become a mother you are some how holy and untouchable, and need to kind of be like the Virgin Mary or something. If you think your guy is likely to have any of these sorts of issues then by all means have counselling/read up on it/whatever, but honestly most blokes don't have anywhere near the issues like in that article.