I like the way you (Lazarus?) think
Lazarus Long, aka Woodrow Wilson Smith, aka "The Senior" (the oldest man in the universe) is a character in a science fiction series by Robert Heinlein. The first story is "Methuselah's Children", written in 1953 or so, (I think) and still fresh today, which is included in a book called Revolt in 2100". That lead to several books The quote is from enough for Love(1973), and is probably included in "The Notebooks of Lazarus Long" as well. Another book in the series is "To Sail Beyond the Sunset" (1987), which a tale Lazarus Long's Mother, who isn't as old as Lazarus, thanks to being snatched from somewhere around now in time, into the distant future, whereas Lazarus got "there" the hard way, by living around 2,000 years, subjective.
The Methuselah story is pretty mild, but they get increasingly raunchy. Still good reads, and the sex is an important part of the story, or at least of the message. Needless to say, I have all of those books all but "Revolt" in hardcover. (I first read it at my in laws, possibly in about ).