Bathing with your baby boy

My grandma just made me so mad!! She has 3 boys & 1 girl. I asked her if she ever bathed with any of her kids and she really got offended. She basically said 'why would you want to bathe with your baby boy' and I'm just thinking to myself 'why wouldn't I?' It's a baby whether a girl or a boy. 😑 he'll eventually see/hear about girl parts anyway so why not teach him at home. I had planned on bathing with my son occasionally but now I guess I won't.