My premature dick can't handle Wifey's perfect tight and wet pussy. So it's better kept locked up securely. Safe from any pressure to perform and disappoint, and feeling the only tightness I deserve. The tightness of my chastity cage.
My ex-wife defeated me as a man. Through the last 10 years she trained me into a horrible premature ejaculator by only letting me orgasm with minimal physique and visual stimulation. If I didn't cum immediately, my chastity sentence would be extended.