How we got into fisting

My husband and I were drinking and shower drinking and drinking up til bed time. We decided to have sex...you know piv sex. Well after a while he started sticking his fingers in one by one and he eventually balled his fist...I'm thinking after he took 3 fingers out and started pushing and I started pushing with my hands on the bottom of the couch and I pushed with all my might and got his hand in without lube. I won't admit it but I was hooked. The next day we got lube and tried it again. I was really hooked but still wouldn't admit it. I was 2 months from turning 21 and fought myself a lot for those 2 months on what I wanted to do. By my 21st birthday I thought 1 fist loose could be repaired. Who was I k**ding I was addicted. By my 22nd birthday we had 2 fists in and I thought if we stopped there I would be 1 fist loose at most. Now that I'm 23 I can take 3 fists for a min or two...I can take 2 fists and a penis...idk all night. I can be double fisted in my sleep.