I agree My kids were allowed to say" Oh my goodness."
Funny story:
When my kids were little and I only had the 2 older ones. One was 4 and one was 3. Well I drop my son off at preschool and now I am driving home with my daughter. She is playing some sort of hand held game. She says, "oh my goodness" Then she says, " Mommy I'm allowed to say Oh my goodness?" I said yes that's fine. She says, " Better than oh s**t mommy". Well I almost ran off the road. Where ever did she hear that from!???
I said," yes much better"
So Oh my goodness is fine to say. hehe