It is impossible to maintain the same feeling every moment. 

Feelings are (like) roller coaster
bouncing balls  ping pong walls 

ess shaped snakes
curvy lines and waves

crossing overlapping slapping
touching not touching

winding lakes oceans rivers ponds and
streams of water dripping dropping plopping flopping
air balloons spinning bouncing hopping jumping
banging slamming winding
squeezing releasing rubber rubbery bands

side to side
up and down
round and around
on and off
open close
in and out
up and down
round about
sling shot