I always solved the problem by making sure that whoever I wanted to kiss/be kissed by also ate garlic so neither minded.
IowaDee - my first thought was also that it must be related to Elephant Garlic. I looked Elephant Garlic up and it seems that Elephant Garlic doesn't contain allicin either and is actually more related to leeks and onions than it is to garlic. Learned something new - Elephant Garlic's name is somewhat of a misnomer apparently.