It definitely becomes addictive, its not only the size and power of a big cock in action, its also the female response to it.. and for me even at 52yo, there a still some deep seeded feelings of envy, knowing how his life is filled with as much pussy on tap as he wants, the booty calls, the one night stands, the wives on the side... and all the joy and confidence that then comes with all of that... and yet I sit there watching his cock bringing all this pleasure while I look down at mine cumming into another tissue and having to be content with what life has dealt me as well.
If you ever want to know if most cuckolds are addicted to cock or not, ask them how many watch 1 on 1 lesbian porn, I would guess it 5%, cucks love to see the symbolic image of a big cock on a virile, sexually potent, confident male... everything most cucks are not.