U know, there was a time when i think i also thought that Love was a choice to be made...
Then i actually fell in love, and when i needed to fall out of love i just couldn't, no matter how much i chose to.
I do see where you're coming from though, and i believe it could be true, although just not universal.
It is only possible to love two people at the same time by intention.
This, i think, is a corollary of your earlier belief that love is a choice.
Here i cannot yet agree. While i may not have experienced this, i've seen it, sometimes in those closest to me.
What causes it? I don't know... indecisiveness, fear, chemical imbalance? Maybe it just is...
This might not be true for everyone...but from what i've seen:
You can't can't help, who you love.
"The good Christian should beware the mathematician and all those who make empty prophecies. The danger already exists that the mathematicians have made a covenant with the devil to darken the spirit and to confine man in the bonds of hell." - St. Augustine