A very good question, what does the questioner think from their side??!!

I know both my ex-wife & I had our own little secrets, she'd confide some things to her best girl-friends (don't you all ladies??!!) & I only knew that as one of them was exceptionally close to me..., I'd confide in anyone that would listen in the pub after work....only joking ;-), no I would tell my best mates (male or female) maybe, depending on just how private it might have been - some things are just too embarrassing to share with anyone other than the mirror lol!

These days what with private email addresses & mobile phone texts etc I think it's very easy for couples to keep secrets from each other, frighteningly so if you want my opinion.

What goes around comes around......