A lot of European comics have a different issue: racism.
I really liked Tin Tin but I cannot pretend like the entire thing isn't incredibly racist. All of the bad guys had a certain skin colour, you could guess who was going to betray the main cast just by their colour/culture, and a lot of other cultures are portrayed like savages (sometimes literally).
I find this interesting when you think America is considered to be much more prudish than Europe. Anecdotally it seems that although sex and nudity is less taboo in Europe it isn't abused in the way it is in America.
It's not really that weird, though; both behaviors are a result of a lack of maturity dealing with the subject, as taboos often are.
In a comparable situation, the Catholic countries which were/are more devoted (and often fanatic, such as in the Inquisition) are also the ones that have the most blasphemous slang and insults. Spain in particular has a whole host of them involving religious figures (God, the Virgin Mary, etc) and scatological acts.
Got to a comic store in Paris an there's an abundance of comics that are 'real' and kids friendly. No boobies or asses etc.