People get themselves all steamed up about weather they're in love or not. They ought to realize that the love part is perfectly easy; the hard part is working out, not about love, but about what they're going to do. The difference is that they can get their brains going on that, instead of taking the sound of the word "love" as a signal a signal for switching them off. They can get somewhere instead of indulging in a sort of orgy of emotional self-catechising about how you know you're in love, and what love is anyway, and all the rest of it.