Every people on the earth has different penis size. Some has bigger (more than 6 inches), some has average (between 4-6 inches), whereas some has small (below 4 inches) private parts.
But today we are here to suggest a trick by which you can know the penis size of any man, and it is possible just by seeing their fingers.
Well, the trick is very simple and is based on some study.
Actually the study has revealed that people whose index fingers are shorter than their ring fingers tend to have larger private parts. This has to do with testosterone as it controls both finger and penis length in fetuses.