It’s difficult to wiggle your penis into a snug chastity tube. Sometimes you can use a lubricant, but I find the ‘stocking method’ very simple. Plus, most of the time, with a proper fitting metal cage, I prefer to be clean and dry, without any lotions or powders. They tend to stay sticky and can cause irritation.
Get a thin anklet or footie nylon stocking.
( I don’t recommend using a longer stocking and cutting off a section to use, they fray, and these threads get caught as you pull on your penis.)
Pull the stocking through the tube, and fold about 2 cm back over the tube.
Line up the your piercing with the hole in the cage, then insert the tip of your penis.
Now gently pull. With practice you will put the penis into position without any extra stocking. This will take some practice. The PA and your locking pin has to be lined up. This too takes some practice.
Sometimes I take the pin and place it in the opening of the urethra, going backwards, it will pop out the opening on the shaft of the penis, and you can test alignment. Now pull the pin out, and insert it into the base of the cage, into the bottom of the PA hole so that it comes out the tip of the urethra. Time to lock things away! Hope that helps.