The kiss

This is the label of a bottle of wine. Hanulli only buys wine if it has a funny/beautiful/interesting/noticeable label, so it seems. For the latest example see here.
In the case of O'lala, the kiss is in the entrance of the Hochzeitsturm (wedding tower), the tower located in the famous Artist Colony of Darmstadt.
And the interesting part is: our son M. is going to marry in two weeks in this very Hochzeitsturm !!!