We got a rather poor selection of presents from my DB and though I don't much mind for myself, we appear to have got (I am reading through tissue paper) an age inappropriate book (subject matter tedious rather than X rated, but maybe for a young teenager, not just 1-2 years too old) for my DS Christmas present (we suggested books it is true). He's nearly 4.
The suggestion from friends is that we ask them to switch to children only presents in future which I think is great advice as it saves thinking up something for DB who already told me he didn't like a book I got him.
I will not be telling DB that I don't like the book he got me, but I'm considering saying something mild about the book he got for DS being something we'll save for a few decades years ahead.*
*
Or just wait till he's older and can write his own passive aggressive notes?**