Ok so since I don't have a job and my fiancé works from 6am-230pm we take certain shifts with DD.…

Ok so since I don't have a job and my fiancé works from 6am-230pm we take certain shifts with DD. I'm with her from midnight and until he gets home but I'm still awake to help out a little until 5 or 6 and he has her until midnight so he can get 5 hours of sleep. The time from 8pm-midnight Ava gets really fussy with him, and he has a short temper and yells a lot. The second my shift starts and I pick her up it takes me a half hour to calm her down and she's either really content or she passes out. Am I the only one who sees a coincidence? I should mention this to him but idk how to bring it up without him flipping out. Why are men like this