To me, love and lust are simple, I would like to think they are I guess, but they really aren't, their are many gray lines.

To me, love is giving and lust is taking.
Love is from the spirit, and lust is from the physical body.

But as living beings, we are both, so we have to make both work.

Love is totally sacrificing and only thinks of others first, lust thinks of itself as first, with no concern for others. So ideally love and spirit find common ground to find balance. If we are too spiritually we cannot function here on earth, and if we are too earthly, the same applies for different reasons.

So both spirit and body has needs which need to be met, together they find find common ground and help to full fill each other.

I guess I could of made this shorter if I had thought about what I wanted to say exactly first, but I guess even here I am verbal processor, it drives my wife crazy, thinking out loud all of the time.