On the Quest : The offering of Bilva Patra is considered primary while performing the rituals and puja upon the Shivling. Here's a brief understanding of the topic.
The Stone Age man survived on hunting for hunger. Did He earn the wrath by killing? All those beautiful flowers which we not only place as offerings during prayers, but also use them very talentedly at various arrangements in churches, temples, offices, homes, events as well as times of death are they lifeless? Why then we are supposedly allowed to end life of some beings guilt free yet we are condemned for the others?
What can one offer to HIM who is the provider of all that is and that will be? Can I please God with my abundant offerings and how?