In compendiums of odd or weird laws, one of those often cited is that in France, it is illegal to kiss on railways. (Something tells me this law often gets broken in France.)
Actually, the law specifically was written as a safety measure. It is a measure to prevent kissers from engaging in osculation (and possible follow-up activities) while being physically on the railroad tracks. It anticipates that the lovers might be distracted, and fail to see, hear, or feel an incoming train.
However, if you are riding in a coach, you may kiss a willing partner to your mutual hearts' delights.
There's still the odd French law to be explained: why it is illegal to name your pig Napoleon?
My Two Landmarks
2 hours ago