It must have been on purpose?

I had to go to my university today to give back a library book. Among the various posters on the wall was one loudly promising a "Kinky Summer". I didn't know our students' association (that has to approve of all posters as far as I know) was that open-minded!

A closer look revealed an almost invisible "s", and the information that "Kinsky" is a party location. First look was more fun, though. xD