/r/SFWporn
non-pornographic porn
also it's probably still not ok to show your kids
If you don't get it just google it.
Well there are no specifically related subreddits but i guess these come close:
Rules:
1. No "who is this", "source?" etc posts. Be creative with your titles.
2. No actual porn. SFW images only.
/r/SFWporn