If I told you, you might be forced to lie about it. Not that you aren't really good at it, but why put an old man in that position?

Reality Check
His lying is not contigent on who you are or what you do. His lying is not your fault. Lying is his choice and his problem, and if he makes that choice with you, he will make it with any other woman he’s with. That doesn’t mean you’re an angel and he’s the devil. It does mean that if he doesn’t like certain things about you, he has many ways to address them besides lying. If there are sexual problems between you, there are many resources available to help you. Nothing can change until you hold him responsible and accountable for lying and stop blaming yourself.

The lies we tell ourselves to keep from seeing the truth about our lovers don’t feel like lies. They feel comfortable, familiar, and true. We repeat them like a mantra and cling to them like security blankets, hoping to calm ourselves and regain our sense that the world works the way we believe it ought to.
Self-lies are false friends we look to for comfort and protection—and for a short time they may make us feel better. But we can only keep the truth at bay for so long. Our self-lies can’t erase his lies, and as we’ll see, the longer we try to pretend they can, the more we deepen the hurt.

Sometimes you lie to deceive people. Sometimes you lie because you need the lie to become the truth.

People tell all kinds of lies to save their skins.

It is often the case that the man who can't tell a lie thinks he is the best judge of one

Talking is not easy. Talking intends to convey what you mean. Lying is easy, not talking. When one lies, one does
not care, and that’s the easy part.