"My decision [not to have children] probably reduced the 2050 population by 5 to 10 people."

"I don't use Google. I don't use Facebook. I don't use Twitter. I don't use any of those things."

"How should a girl prevent boys from getting infatuated with her? Regularly use a detergent, and when that fails, apply the antidote."

"Not having children is an important contribution to humanity."

"If a program is useful, people will want to use it; if a program is useful and free, people will want to use it more."