Maybe I'm a bit cynical and unromantic but I don't see romantic love as always being an entirely altruistic thing where the person's needs are always and forever put before our own or are even always on a par with our own.
But I think like this about other forms of love too and for me, motherhood is a good example where the ideal that's often held up is selfless sacrifice which few can (or should IMO) ever sustain.
So just as it's possible to love a partner deeply and yet still behave very selfishly at times, it's possible to love a child deeply and yet be selfish at times too.
I think the best parents are mostly altruistic but it's never possible to be entirely so, 100% of the time.
And the best couples are altruistic in their love some of the time, consider their partners' needs as equal to theirs most of the time, but who acknowledge that there will be times when both put their needs above everyone else's in the pecking order.
I don't see selfishness in itself negating love.
And I don't think anyone in a long-term relationship always loves 100%, all of the time.
In a way, I'd rather people be a bit realistic about this than having overly romantic notions that being attracted to someone else, feeling infatuation and even having an affair automatically means not loving an existing partner.
If people perhaps weren't brainwashed into believing this unattainable ideal of romantic love, maybe they wouldn't feel compelled to treat their partners so unlovingly when an affair starts and to believe this cobblers that 'loving' someone else (even if love is what it's believed to be, rather than 'new infatuation') means it's not possible to love the original partner.
I do take your point Fairenuff about how conflicting it is to love someone and to deceive them, but I think this is yet another crock of shite that gets sold to the masses. That what the eye can't see, can't hurt and that the deceit itself is an act of love and protection.
No-one ever seems to recognise how badly they are hurting partners and kids while the affair is going on, do they? They think they are 'compartmentalising' and the two worlds aren't colliding at all.
I agree that love means different things to different people. So for me, I can see how I might be infatuated with a new partner who I only saw in secret and not in dull, ordinary everyday situations- while still loving DH- but I don't think it would be possible for me personally to love two men. Love for me only comes from knowing someone really well and seeing them in every conceivable situation where they feel able to show all their 'sides'. Everything else is just 'new shoes'...