nipple confusion

Can someone please explain nipple confusion to me. Because when I think about it wouldn't giving a baby breast for a month then trying to introduce a bottle after that confuse the baby? Should you include breast and bottle from the beginning so they're not confused. I plan to mostly breastfeed and then have my husband and daughter bottle feed the baby as a bonding experience. Still not sure how often bottles will be used, my husband for sure wants to feed the baby at least once a day but my daughter may only want to do it every now and again. So once or twice a day maybe.