I was in The Hague the other day with an hour to spare while my daughter was at the Ballet School there. I wandered through the station looking for a place to have coffee. It was a miserable day: cold with drizzly rain.
This is what I saw when I came out of the station
I looked closer and saw that this was a fantastic promotional action from Page WC paper (Page is a Kimberly-Clark brand in the Netherlands). Overnight they had fitted all the bicycles parked outside Den Haag central station with blue plastic saddle covers with this tag-line
Which translates as "be nice to your bottom"!
Since then there have been more actions in other Dutch cities
and they didn't stop at bicycles either: