I've seen - and now really really want - a set of unicorn make up brushes.
(Now I have explained to him what they are) DH thinks they are for "teenagers or adults who wear fairy wings and face glitter to festivals". He has pointed out (accurately) that I am neither of those things. I have pointed out I could easily become the latter... 
I think they will make me smile every time I use them. They are not super expensive (there are loads available at different price points anyway). Can anyone think of any reason why I shouldn't get them?