Really?
I can't say I've noticed.
It happens occasionally, but on the whole, doesn't. In my world it's rare, happens to a minority.
I think " all the time, when socialising " might be a bit of an exaggeration.
It's true I greet both men and women with a kiss in my social group, but I quite enjoy that.
Then you are lucky. But then from your comment I guess you largely socialise in mixed gender groups, probably with spouses. Kissing friends isn't harassment.
Where I won't disagree is that it is far worse for women younger than you or I.