A girlfriend’s hotness alone is an amazingly accurate predictor of how quickly the average man will grow bored of sex with her:

• Hotness 0-3, Time to boredom = 1 second.
• Hotness 4, Time to boredom = 15 seconds.
• Hotness 5, Time to boredom = 5 minutes.
• Hotness 6, Time to boredom = 3 weeks.
• Hotness 7, Time to boredom = 6 months.
• Hotness 8, Time to boredom = 2 years.
• Hotness 9, Time to boredom = 5 years.
• Hotness 10, Time to boredom = 10 years to never.