The moment I became a mother I realized that the more time I could spend completely by my son's side, the better off I was. Postpartum depression, postpartum anxiety and a traumatic pregnancy, labor and delivery left me with a polarizing fear I didn't know how to handle, so I needed my son next to me at all hours of the day and night. We co-slept, we breastfed on demand and, not surprisingly, we co-bathed. Turns out, there are so many reasons why co-bathing with your kid is just the absolute best; reasons that go beyond my postpartum experience and my overwhelming, obsessive need to be around my son at all times.
Of course, this isn't to say that the only reason a mom should (or would) co-bathe is because she is experiencing postpartum depression or anxiety. What helps a mother through those mental issues will vary depending on the mother, so in no way are co-bathing and support for postpartum depression or anxiety automatically related. It's just for me, personally, co-sleeping and co-bathing helped me through my irrational fears when I was a new mother. Then, after I found the treatment I needed for both, I was able to really enjoy co-sleeping and co-bathing which, you know, are both awesome. Now that my son is two-years-old and my postpartum issues have faded away and are now nothing more than a distance memory, I can truly appreciate the moments when I can simply enjoy being around him or near him (and not do so out of some irrational necessity).
Which means, now, co-bathing is just a fun thing we get to do from time to time. Now, co-bathing is about playing with those hilariously cheep but somehow super entertaining bath toys and drawing on the tub with bath crayons and making my son laugh when I blow bubbles at his little face. Now, co-bathing is just fun (and practical) and the absolute best, for the following reason: