Taking selfies with other sims gives a massive amount of friendship points.
No idea if this is a bug or not, also not sure if this is where I should post this (these forums are confusing) but using the "take photo with" action twice and taking 10 photos with a sim gets me alm...
Just noticed it yesterday. It's fine with friends, but I don't want my sims to become good friends with everyone they take a photo of. I am pretty sure that it wasn't always that way