The bulb while requiring multiple insertions is fun to play with also. Varying the depth of nozzle penetration provides different feelings of the flow.
I personally like the feeling when the nozzle is inserted very shallow. I can feel the flow of the enema as it streams through my anal canal.
As an added bonus when the last of the insertions are completed I like to allow the bulb to capture some air. Squeezing the mixture of air and water creates a bubbly/gurgly sensation that can be repeated over and over by simply squeezing and releasing the bulb (sucking back in) in unison with a potential building climax. AHHHH