I think it's fine to bathe with your childen up to the age where they give out signals they're no longer comfortable you seeing them naked (and they make it very clear when they consider they're too old to be naked) or you're sick of them taking up all the room in the bath. The human body isn't something to be ashamed of and letting your kids see you naked day to day in non sexual situations teaches them what is appropriate (eg it's fine for mum and dad to see them naked, it's not for most other people) and if you screech like a girl if your kid catches you naked it sends out the message that bodies are dirty. I bathed with my kids until they were about seven or so, it was easier, one lot of bath water and I didn't end up with soaked clothes from washing and drying duties. They stopped bathing with their dad (although it was infrequently that they had, he found it a pain) when they were about four but not for any reasons that it was 'indecent' or wrong, just because he enjoyed his bath more when he had it to himself. I loved bathing with my kids, we'd soap one anothers hair and do sonic type hairstyles, play wih bath toys and have a general good time.