Confused

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My husband has me so confused . We have 3 kids and my husband has said no more kids. I agreed and suggested getting my tubes tied. He adamantly said No. I never take birth control it just doesn't agree with me it prolongs my period to no end. So I track my cycle etc. to avoid pregnancy. Im sick of doing it and want to just not think about it anymore. Why wouldn't he just want me to tie my tubes if we both agreed that we don't want anymore? PS I know it's my body but I will never do something permanent without us being on the same page he is my husband of 10 years not my boyfriend.