What does my weight have to do with how hard my rifles kick? Actually a heavier person will "rock" back with the recoil less, so the inverse is more likely to be true. You have the rifle weight issue correct, since the added weight slows the recoil over a longer period of time.
Fisherman, If you agree a heavier rifle will have less felt recoil, then you must also agree a heavier person will have less felt recoil.
Think about it. When the rifle is pressed tight against your shoulder, you are your rifle become one object.
Just think what the recoil would feel like if you held it 2 inches of your shoulder.
There is no point in arguing this, it is a fact. You can search online if you do no believe me. Look for a physics website.
For every action, there is an equal and opposite reaction. The propellants energy forward (bullet, extra powder, etc), is transfered equally backward.
When shooting a 30-06 the forward moving object is a 150grn bullet, with the rifle shouldered I have about a 180lb object moving backward.
Ex.
Hit a golfball with a baseball bat and it is going to go flying! Hit a bowling ball with the same force as before and it is not going to move much at all.