First measure your waist circumference and prepare the result in cm.
Take down your dick length in cm when you are 100% hard.
If your waist cicrumference is 80cm and dick length is 20cm, your lockup period is 80-20=60days
You now know what type of men get the longest lockup period?
email me at mistress@doctor.com to enquire my chastity keyholding service