When Dads do it they get thank yous

Why is it when Dad gets up with the baby during the night one night, he gets thanked for doing it. But when Mom does it every night, it just what she’s supposed to do.

When Dad gets up all night with the baby, he gets to sleep in the next day. When Mom does it, she gets up and goes about like a normal day.

My toddler and I have been both suffering from two really bad sinus infections. I was up with her the other night where she threw up all over me. Literally. Covered my entire shirt front and completely covered my left arm down to my hand. I cleaned her and I up. Cleaned the floor of the bathroom where we didn’t make it. Then got her settled and back to bed to get my 3 month old. After two night of 2 hours of sleep and barely surviving, my husband took over for the baby last night. I slept 8 hours of uninterrupted sleep and it was glorious. This morning he slept in until 1:00 pm. I didn’t say thank you and he’s let me know it. I thanked him after it was brought to my attention. Of course I’m thankful but I never hear thank you for when I do it. It just seemed silly to me that he was looking for it. It like when he can leave the room or the house to go anywhere without asking “hey can you keep an eye out while I go do such and such”. But if I need to do those things I need to make sure I clear it first so that the kids are watched. Why do Moms have to jump through the hoops?