Honestly, I haven't come across any particular case so extreme: a 14 year old with a thirty something, but I can tell that traditionally young women date older men, even since an early age. It was -is- completely common in high school years to see the 13, 14 year olds with the 5th year students, and this trend persists in other age groups.
Taking away the peope who are truly in love no matter the age, social difference, my impression has always been that younger girls/women see their male age peers as unexperienced (and/or broke), whereas many men seem to prioritize youth and beauty, that many mistakenly consider to be the same thing. A couple made up of a 30-something woman with a 50-year divorced men is already part of the social landscape of Argentina...