In my opinion, the arising of lust consist of both physical
aspect and spiritual aspect, they are inter-influencing.
The physical aspect which include the neuro, hormone, electric
pulse and organ only acts as a stimulator that trigger the arising
of lust on us.
So does a baby has lust? yes, of course, but because his physical
condition is not complete yet so there is no arising of lust in
him.
There is this spiritual lust (mind) that a baby as well as all
other unenlightened beings has.
When the lust-causing object get in contact with our physical part
for example seeing pretty girl sitting opposite you, this signal
will then send to our mind and trigger the arise of lust.
It can also come from different direction, meaning there is no
pretty girl there, but somehow our mind initiate the thinking of a
pretty girl. This will then cause our body to react
accordingly.
So the question is what if we get rid of this physical layer of
lust mainly the chemical and electrical pulse, we are still a
lustful and unenlightened person.
Due to the loss of the physical aspect of the lust, it will be very
difficult if not impossible to get rid of our spiritual/mental
lust.
In fact, the changes to our body in a unnatural way will cause even
more harm.
