As stated, I make my own cream and I add a few other ingredients, Arginine / Citrulline powder and liquid DMSO. I add these and the Stanolone to PhloJel Ultra. It works out perfectly as the containers of PhloJel are 100 grams so the math is easy. You can use the DMSO cream instead of PhloJel (cheaper and easier to get).
I use a quarter sized drop and apply it to the entire penis followed by vitamin E oil and shea butter after about 5 minutes. I don't use vitamin E oil and Shea if I am applying to the perineum.
As to application sites, I mostly apply to the penis as it works wonders on sensitivity and ejaculation intensity. It does increase libido as well. The perineum application is a stronger libido bump, but none of the benefits that the penile application has. I theorize that the cream is absorbed into the prostate due to the proximity of the area. I have noticed a decrease in ejaculate after a few days of this method and a mild buzz in the prostate, not unpleasant, but it results in lesser ejaculation intensity. Higher libido with reduced rewards... something to consider. I have never tried the shoulder, or any other area.
Overall, I have settled on the penile application as that is what works best for me. I feel it's very rejuvenating. I am considering the P Shot as well.