Perhaps you can explain whay a professor has so much spare time. One I know puts in 16-18 hour days and not on the internet either.
I have right near me papers that I have been grading throughout the day, and a final that I have been preparing to give next week.
As with most intelligent people, I am capable of multi-tasking, and responding to folks like you requires very little mental energy.
Thorough enough explanation for you?
Don't you work for a living? What are you doing spending so much time on the Internet??