Harley Davidson Closing Plant Due to Declining Sales    Apparently, the Baby-Boomers all have motorcycles. Generation X aren’t buying as many, and the next generation isn't buying any at all.   A recent study was done to find out why. Here are 15 reasons why Millennials don't ride motorcycles:   1. Pants won't pull up far enough for them to straddle the seat.   2. Can't get their phone to their ear with a helmet on.   3. Can't use 2 hands to eat while driving.   4. They don't get a trophy and a recognition plaque just for buying one.   5. Don't have enough muscle to hold the bike up when stopped.   6 Might have a bug hit them in the face and then they would need emergency care.   7. Motorcycles don't have air conditioning.   8. They can't afford one because they spent 12 years in college trying to get educated.   9. They are allergic to fresh air.   10. Their pajamas get caught on the exhaust pipes.   11. They might get their hands dirty checking the oil.   12. The handle bars have buttons and levers and cannot be controlled by touch-screen.   13. You have to shift manually and use something called a clutch.   14. It's too hard to take selfies while riding.   15. They don't come with training wheels like their bicycles did.