Breast milk remains the best to a child until his taste board becomes more effective in clarifying tastes... Your mom's food remains the best, unless you taste a sweeter one... So what am saying is that the first is given the opportunity to actually be the first person to explore everything with you, from outings, to kisses, romance, and sex... He gets to be the first to actually experience all these with you and when done properly, he leaves a long lasting impression, that even when you're with someone new, and making love, you may unknowingly call his name, but the first ain't remembered when someone else is able to do more than what was initially done there by creating a new experience