I'm for (About true love).

Reason 1. Normally love needs a heart to exchange which we have only one and we can't split it.
Reason 2. When someone committed to another one; they can't cheat directly.
Reason 3. One can be fallen in love with multiple persons at the same time but they can't treat all of them equally; the true lover would always be the real one and others are for benefit, i guess.