Couples in the US have started asking for 'social media clauses' to be included in pre-nups.

These digital agreements determine what images and information couples may share about each other on sites like Facebook, Instagram, Vine and Snapchat, with penalties for violations like sharing an embarrassing story or an ugly bathing suit photo.

A top attorney in New York says each breach of an agreed rule can range from a $50,000 (nearly €37,000) fine to being forced to scrub the toilet.

A typical clause will state couples can't post nude photos, embarrassing photos or anything that is likely to harm a spouse's professional reputation.