The old man was quite the swinger, and had high hopes for me. So to soften the blow for him I had to come up with a solid argument as to why I won't participate in the most instinctual act. It's true, my self-esteem is just too low to put a young belle through the whining misery that would be a night with me. Second is the name. To perform coitus sounds awfully familiar to something my grandfather would include in a story about getting an enema.
Sex also cheapens a relationship.
I have drawn out a scenario to persuade non-believers that still believe that sex is a manifestation of love. Partner A is set on more grinding and sweating while Partner B would rather catch up with old friends at dinner. Dismal times follow. B finds it hard to talk to A because A always has that aggressive look in his or her eyes. B announces nonchalantly that he is exhausted and has a paper to write, so A knows that it isn't tonight.