Classification of
Feeling gives good Understanding!

The Blessed Buddha once said:
What, bhikkhus, are the 2 kinds of
feelings?
Bodily feeling and mental feeling.
These are the 2
kinds of feelings...
What are the 3 kinds of feelings?
Pleasant feeling, painful feeling, and neither-painful-nor-pleasant
feeling.
These are the 3 kinds of feelings...
What are the 5 kinds of feelings?
The ability to feel pleasure, pain, gladness, sadness and equanimity.
These are the 5 kinds of feelings...
What are the 6 kinds of feelings?
Feeling produced by eye-contact, ear-contact, nose-contact,
tongue-contact,
body-contact, and feeling from mental-contact.
These are the 6 kinds of feelings...
What are the 18 kinds of feelings?
Such 6 sense-evaluations produces gladness, 6 sense-evaluations
produces sadness,
and 6 sense-evaluations produces equanimity.
These are the
18 kinds of feelings...
What are the 36 kinds of feelings?
Six types of household life gladness, 6 types of Noble Life gladness,
6 types of household life sadness, 6 types of Noble Life sadness,
6 types of household life equanimity, 6 types of Noble Life equanimity.
These are the 36 kinds of feelings...
What are the 108 kinds of feelings?
The above 36 feelings here and now in the present, those 36 feelings
in
the future,
and the above 36 feelings in the gone by past.
These are the
108 kinds of feelings...
This, Bhikkhus, is the Dhamma explanation of the 108 feelings.

Comment:
Whenever feeling
something, then classify the feeling into one or
more of these
groups...
Further classification of feeling does neither
seem necessary, nor
practical... Detailed explanation is given here:
Atthasata Sutta: The
One-hundred-and-eight Exposition
http://www.accesstoinsight.org/tipitaka/sn/sn36/sn36.022.than.html

All
mental states converges on Feeling (Vedanā):
https://What-Buddha-Said.net/drops/II/Indifference_Creates_Ignorance.htm
https://What-Buddha-Said.net/drops/II/Three_Basic_Kinds_of_Feeling.htm
https://What-Buddha-Said.net/drops/II/Feeling_Causes_and_Effects.htm
https://What-Buddha-Said.net/drops/II/The_8_Aspects_of_Feeling.htm
https://What-Buddha-Said.net/drops/II/Bodily_and_Mental_Feeling.htm
https://What-Buddha-Said.net/drops/II/Detached_from_Feeling.htm
https://What-Buddha-Said.net/drops/II/Dependent_on_Contact.htm
https://What-Buddha-Said.net/drops/III/Focusing_on_Feeling.htm
https://What-Buddha-Said.net/drops/III/Analysis_of_Feeling.htm
https://What-Buddha-Said.net/drops/II/The_108_Feelings.htm
https://What-Buddha-Said.net/drops/II/Emotional_Storm.htm
https://What-Buddha-Said.net/drops/II/Latent_Feeling.htm
https://What-Buddha-Said.net/drops/IV/Five_Feelings.htm

Classification of the object in various
ways makes one understand it better!
Source (edited extract):
The Grouped Sayings of the Buddha.
Samyutta Nikāya.
Book IV [231-2]
section
36: On Feeling: Vedanā.
The 108...
22.
http://store.pariyatti.org/Connected-Discourses-of-the-Buddha_p_1379.html
https://What-Buddha-Said.net/library/ati_website/html/tipitaka/sn/index.html