“Here’s another halachah that it says straight out in the Shulchan Aruch: you’re not allowed to kiss your child in shul. “
I actually just heard this VERY recently (it definitely is not taught in school). So how many people in the CR observe this halacha? I admit to being nichshal, especially with my grandchildren. How many fathers have not kissed their sons when they got their aliyah on their Bar-Mitzvah Shabbos?