Why is it when my husband takes night shift with our newborn he sleeps longer and more but when it's…

Why is it when my husband takes night shift with our newborn he sleeps longer and more but when it's my night he doesn't sleep that well and just wants the boob? I seriously don't get it and it kinda hurts my feelings and makes me think and feel I'm doing something wrong. Idk what or why though. All I know is when SO has night shift and I've already pumped enough for two feedings I still wake up soaked but when it's my night I never wake up soaked. Ugh it makes me jealous sometimes lol