Other than making sure to BD on the appropriate days, he doesn't really "help" with charting, lol. However, occasionally he'll ask how my temps are looking and sometimes I'll talk to him about fertility stuff. The other day (the day before my period started) he asked me what DPO I was

. I said "I'm 14 DPO", I then started to tell him that a woman's Luteal Phase is 12-16 days and he cut me off and said "yeah I know, you already told me. That's why I was asking."
As for personality changes? No, I haven't really noticed a difference.