Why do men never understand the consequences of their actions?!

Rant/ Partner decides on Saturday night to spray squirty cream in our 2 year olds hair as a joke. They’re both having a laugh, it’s absolutely fine, no problem, I tell partner he’s going to need to bath our 2 year old so he can wash the squirty cream out of his hair, he can’t just wipe it because it will stink of sour milk and clump his hair together. He says fine, no problem, takes him upstairs and I assume baths him then does the usual bedtime routine (fyi 2 year old normally has a bath before bed even when he doesn’t need it because he just really enjoys baths so it’s not unusual or an extra inconvenience for this to be done by my partner anyway) Sunday I’m cuddling with 2 year old on the couch and stroke his hair, it’s all crusty feeling and smells like sour milk, I ask partner if he washed his hair in the bath, partner says he just rinsed it with water and he didn’t need a bath, I tell him he needs to make sure that he has a proper bath tonight and that he washes his hair with shampoo because he has nursery the next day Gets to 9pm and I come upstairs after looking after and settling 5 month old, partner didn’t bath him again so didn’t wash his hair, 2 year old is now asleep and I don’t wanna wake him up so now he has to go in the bath at 7am the next morning (aka today) because he needs to be washed ffs what is partner not understanding So now we’ve had the morning of all headaches because we’ve had to wake our 2 year old up early, put him straight in the bath, wash his hair and then do normal routine but we haven’t had time to ease him into any of it or allow him to wake up properly because we need to get stuff done Partner is now mad at me because 2 year old has been kicking off when it’s all partners fault in the first place because if he’d have just done what he was supposed to do when he was supposed to do it instead of half arsing it and being lazy none of this would’ve had to happen