Concerning Kissing in a shul – I once heared that the Brisker Rav Zt”l pointed out that since this halacha is brought in “Hilchos Tefilla” and not in “Hilchos Beis Hakneses” this proves that the problem has to do with kissing DURING DAVENING, not with kissing in shul. Based on this, it is not forbidden to kiss in a shul while davening is not going on.
Although I heared that some poskim disagree with this psak, This can be a limud zechus for kissing at a simcha, bar mitzvah etc. which takes place in shul since there is no davening going one at that moment, (there’s usualy a break for the people to say mazel tov). This works especialy for a Bris which takes place after the davening is over.(Zaidy, just make sure you hold your kisses for after “oleinu” which comes after the bris, and at the bar mitzva make sure to kiss quickly before they re-start the davening).
(So you guys always thought that BRISK = CHUMRA – well here you got it – a “Brisker Kula!”)