There is a gland in the mid brain called the pineal gland, which produces serotonin, melatonin (i have no idea what they are for) and Dimethyltryptamine (DMT). Dimethyltryptamine as a chemical/ a inhaled drug causes a near death experience. Wikipedia quotes Near death experience as "A near-death experience (NDE) refers to a broad range of personal experiences associated with impending death, encompassing multiple possible sensations ranging from detachment from the body, feelings of levitation, extreme fear, total serenity, security, or warmth, the experience of absolute dissolution, and the presence of a light, which some people interpret as a deity".
Having introduced Shiva Ling and DMT I now need to relate them. When I read the phrases detachment from the body, feelings of levitation, total serenity, presence of a light I can feel a few bells ringing in my head saying this is what meditation too does to your body. Well I am sure we would have heard this already. It is when we meditate at a spiritual level the pineal gland is activated and it produces the above mentioned chemicals and thus near death experience happens. The lings of Lord Shiva that we all have come across is the posture when he is meditating.
Certain other facts and points to think over, related to the same topic:
1. Moments before a persons death there is large amount of DMT produced. Is there a reason/ relation why Lord Shiva is the destructor and he being associated to the penial gland which secretes DMT?
2. It is also found that penial gland works best in complete darkness. (I don't know how light can enter your brain!!) Also the sanctum where the Ling is placed in a Shiva Temple is in complete darkness. Are they related for some reason?
3. The penial gland is in the shape of an eye. This can be easily seen in the pic above. We know that Lord Shiva has the third eye which is vertical.
Hope you found this piece interesting.