I think that some of the lines are quite corny, or "excusey", and if it's used loosely, may appear insincere.. But I also think that knowledge is power, and these can work to your advantage if use sparingly and spontaneously when people least expects it.

Dating Dilemma #1: You need to say something smart at a museum
"It's not what you see that is art—art is the gap." —Marcel Duchamp

Dating Dilemma #2: You're out with very well-read person
"I've given up on reading books. I find it takes my mind off myself." —Oscar Wilde

Dating Dilemma #3:You want to stop talking and start kissing
"A kiss is a lovely trick designed by nature to stop speech when words become superfluous." —Ingrid Bergman

Dating Dilemma #4: You'd really rather not share your feelings
"All the great pleasures in life are silent." —George Clemenceau

Dating Dilemma #5: You're not ready to commit
"Let there be spaces in [our] togetherness." —Kahlil Gibran

Dating Dilemma #6: You're trying to sway someone to be naughty
"If you obey all the rules, you miss all the fun." —Katharine Hepburn

Dating Dilemma #7: It really is all your fault (My personal favourite)
"I am as bad as the worst, but, thank God, I am as good as the best." —Walt Whitman

Dating Dilemma #8: You've been caught in a big, fat lie
"There are no facts, only interpretations." —Friedrich Nietzsche

Dating dilemma #9: You don't want to accompany your date to a family get-together
"Absence is one of the most useful ingredients of family life, and to dose it rightly is an art like any other." —Freya Stark

Dating dilemma #10: You want to watch the big game tonight instead of Dancing With The Stars
"The spirit, the will to win and the will to excel are the things that endure. These qualities are so much more important than the events that occur." —Vince Lombardi

Dating dilemma #11: You're at a restaurant where the service sucks
"What is the test of good manners? Being able to bear patiently with bad ones." —Solomon Ibn Gabirol

Dating dilemma #12: You're putting the moves on a platonic friend
"In the sweetness of friendship, let there be laughter and sharing of pleasures." —Kahlil Gibran
Dating dilemma #13: You're stumped for conversation during a walk through the park
"The earth laughs in flowers." —e.e. cummings

Dating dilemma #14: Annoying friends and relatives keep asking when you'll get married
"The trouble with some women is they get all excited about nothing—and then they marry him." —Cher

Dating dilemma #15: You're caught checking out someone other than your date
"The eyes are not responsible when the mind does the seeing." —Publilius Syrus