Source: The Last Olympian
Source: The Ultimate Hitchhiker's Guide to the Galaxy
Found anonymously in newspaper columns from the early 1920s http://quoteinvestigator.com/2015/12/31/kiss. Originally presented in dialogue format https://www.newspapers.com/clip/5219841/safety_first/: "Dorcas—”Do you ever allow a man to kiss you when you’re out motoring with him? Philippa—"Never, if a man can drive safely while kissing me he’s not giving the kiss the attention it deserves."
It does not seem to have been attributed to Einstein until the 1990s (e.g. here https://groups.google.com/forum/message/raw?msg=alt.freemasonry/YILn0A-U_WM/f1Grm2akU-4J).
Misattributed
Source: Final sign-off at end of final show, Late Night with David Letterman (20 May 2015).
“Actually, any time I get to blow bubbles pretty much lights me up.”
Grist magazine, January 3, 2005, describing his love of diving
Reported in Maturin M. Ballou, Pearls of Thought (1882), p. 142.
Die Entscheidung, sich zum ersten Mal zu küssen, ist die wichtigste in jeder Liebesbeziehung. Es verändert die Beziehung von zwei Menschen wesentlich stärker als letzendlich die Kapitulation; denn dieser Kuss trägt die Kapitulation schon in sich.
Of Life and Love (2005), p. 29 [Über das Glück und die Liebe, 1940]
Source: The Polysyllabic Spree
