You could never guess some of the secrets that people have decided to post on the Internet.
On Reddit, especially on the sub AskReddit, you are likely going to see some really intense answers that are honestly likely true. And if people are suspected of making stuff up, they are totally called out. I've read so many threads full of crazy stories there, but I wouldn't have suspected Twitter of having similar stuff.
The thing about Twitter is it seems (is?) way less anonymous than Reddit. So when Twitter user lovelyjessij asked for people's deepest, darkest family secrets, we were surprised to see people answered with surprising detail.