The French artist Jerome G. Demuth (who also goes by the moniker "G"), recently installed swings around Paris for the public to use.
He explains why at Wooster Collective:
There's something simply charming and disarming about swings ....
There's a feeling of instant affection for any individual who would stop everything and just take advantage of the moment, allowing herself to get swept away.
You can see more of his work on Flickr.