Whilst having a shower DD 17 months usually plays happily with books and toys on the landing. Stair gate at top of stairs and on bathroom door, then bedroom doors shut means she is safely and happily contained. Our toilet is separate from bathroom and DD has recently started saying "wee wee" and knocking on the door. Thought she was unusually quiet whilst I was in shower so called her name and she appeared at door dripping wet - she pointed at the loo and said "wee wee" then tapped her head and said "hair" - the look of horror on my face in complete contrast to her own very happy,pleased with herself grin seemed to prompt multiple repetitions of "wee wee, hair". I have never left the loo door open before and needless to say I won't again. My DD washes her hair in toilet water - AIBU to think that today I am the worlds worst mother?