After searching for "permanent hair removal cream for private parts male product details, positive, negative, ingredients or materials," the results mostly focused on hair removal creams for both men and women, with some products specifically designed for sensitive areas like the bikini line and private parts. Here are some of the key ingredients and features of these products:

1. Thioglycolic acid: This is the main active ingredient in most hair removal creams. It is added in the form of various salts like potassium and calcium thioglycolates and also as pure thioglycolic acid. Together with other ingredients, these acids break down the keratin, a protein naturally in the hair.

2. Moisturizing ingredients: Some hair removal creams contain moisturizing ingredients like glycerine, allantoin, petroleum jelly, and aloe vera. These ingredients penetrate deep into the skin and soften the hair roots in addition to moisturizing the epidermis. As a result, the hair regrows slowly and is also soft.

3. Natural ingredients: Some hair removal creams contain natural ingredients like aloe vera, vitamin E, and olive oil, which help make your skin soft and smooth, and penetrate deep into the hair follicle to remove it at the source.

4. Permanent hair growth inhibitor: Some hair removal lotions claim to weaken, reduce, and delay hair regrowth on legs, arms, underarms, and private areas. They are made from amino-acid-rich plant extracts like saw palmetto, pumpkin seed, and willowherb, which are known for their hair growth inhibiting properties.

5. Suitable for sensitive skin: Some hair removal creams are specially designed for sensitive areas like the bikini line and private parts. They are gentle and safe for all skin types, including sensitive skin.

6. Painless: Hair removal creams are pain-free options for at-home hair removal. They remove hair at the skins surface, and you only need to leave them on for a few minutes to weaken each strand of hair. After this, you can wipe the cream off painlessly, leaving your skin soft and smooth.

7. Quick and easy: Hair removal creams are quick and easy to use, making them a popular choice for at-home hair removal. They are also less unpleasant than other methods like waxing and shaving.

Its important to note that hair will grow back quickly after you remove it with a depilatory cream, usually within a few days. Additionally, some people may experience skin irritation or allergic reactions to the ingredients in hair removal creams, so its important to do a patch test before using them on larger areas of skin.