But as I say in my book

Koch has generally been less explicit in his denials in later life, and refused comment on his actual sexual experiences, writing “What do I care? I’m 73 years old. I find it fascinating that people are interested in my sex life at age 73. It’s rather complimentary! But as I say in my book, my answer to questions on this subject is simply Fuck off. There have to be some private matters left.”

http://en.wikipedia.org/wiki/Ed_Koch