In a study, 50% of all women said they have a backup-partner just in case. 25% of those playing safe, have feelings as strong for him as they do for their current partner. 12% admitted their feelings were 'stronger', and 70% were currently in contact with him. 50% said their other half was aware of the 'third party', 25% said they were already introduced to each other. 20% said he was a friend of the man in her life.