I have girls so maybe that factors in more that I am concerned about their vaginal health. we also don't use diapers here and my babies tend to be naked in our home. So we usually bathe at least once a day. There was a time when it was the only time I had a moment of peace when dd1 was small, so she would sometimes take 3 or 5 baths a day. When the baby is newborn and in my arms a lot, I didn't worry about bathing so much, but once they start being mobile, I like a good rinse off at least once a day. we are a soap/shampoo free family though. If you used soap, it may tend to dry out the skin I would imagine. I also always have them in the bath after a bm. I cleanse with water first, then a bath.
eta at that age of dd2, we took a bath together. This makes it easy, you get a rinse off and the baby at the same time. I still get in with her most every day. dd1 even got in with us for the first time last week, first time all three of us in the tub... I wanted to wait until dd2 was bigger before letting her in with us