I feel you pain. I finally relinquished and traded my finger for the evil pacifier... mostly because we were a hazard on the roadway as I was driving with my right arm all cotorted into the carseat to sooth a hysterical babe. She has really never nursed to sleep because of some oversupply probs. Now she nurses then pops on and off till I give the paci then right to sleep. As for "digging a hole"... babies have intense sucking needs until at least 2 yrs old. Seems like he needs comforting and you're giving it to him, so if you're both happy I can't see that you're doing anything wrong. If it's bugging you try to find another way to give what he needs. Lastly "no cry sleep solution" gives some advice for breaking the "sucking" sleep association.
My mom says I started "walking" at 7.5 months but wouldn't "let go" until 15 months....
My mom says I started "walking" at 7.5 months but wouldn't "let go" until 15 months....