I have a bracelet that says WWPLD.
the argument that if you wouldn't let your partner see you do it you shouldn't be doing it at all is nonsensical and im certain everyone here does not live up to that credo. would you have a wank with your partner watching? scratch yer minge? pick your nose? shave your pubes? etc. etc.
I must be dead inside because it really wouldn't bother me if my partner had a snog with someone who i knew meant nothing to him. you cannot maintain a relationship by keeping the other person in an emotional prison...best way is to keep strong that internal spark of individuality - you're a free person underneath all the relationship, parenthood, family stuff and if a naughty little snog at a christmas do makes you feel like you can breathe again, like you're alive again then seriously...whats the big deal? i think we're old enough and ugly enough to throw out all that dusty religious moral conditioning and weigh it up at face value.
WHY is it wrong? we all know the difference between an personal kiss and an impersonal one. We don't mind if family kiss our partners on the lips so it has nothing to do with lip on lip contact...is it length of time spent at the lips that constitutes an infidelity? 3 seconds? 43 seconds? or is it the intentions and the feelings of the people kissing that matters? analyse your response to the act and you'll soon realise its irrational. Now, you could argue that it is wrong to kiss someone without it meaning anything - and you'd probably be right.