Sorry to lower the tone! 
Our friendship group is four couples and we try to get each others husbands comical gifts.
Well, last year I bought them all a nice bottle of red and the Belgian chocolate bumholes that I'd seen suggested on here - a link for the curious - https://www.firebox.com/Edible-Anus/p6969
I now need to follow this! I appreciate it is incredibly childish but it made me giggle...a lot!
Anyone got any ideas equally as childish!
Otherwise I'm going to get them a nice bottle of red and an interesting salami
I'm a proper grown up usually I promise! 