- They are victims of their own chemistry.
- It’s a Russian (or terrorist, etc.) plot.
- Because they are fools: definition, uneducated about falling in love. Education programs complete with PowerPoint and handouts will be required to reverse the syndrome.
- The people they fall in love with have used their masculine/feminine wiles to great effect.
- Clumsy.
- They have not found the right hobby.
- They have been struck by the love bug, or bugus lovelicus, and antibiotics are not effective.
- Trick question. There is no such thing as love. There is only long-term infatuation.
- Just unlucky, I guess.
- Just lucky, I guess.