I advice you open special rooms. I will call them "Cabins of Happiness".
They will be built like street WCs or cabins.
At these small rooms you can kiss with your love, if you don't have your own flat or you can't live together at this moment.
Entrance to "Cabins of Happiness" is payable - you have to put some coins and a door will open. You can stay there just for paid number of minutes.
I am sure making these cabins will be repaid soon.
There are too many young people who wish to kiss at the streets or don't have a place where they can spend their time alone with each other.))