Do you mean "Why is the tip of your penis inside your foreskin?" Or do you mean "Why is your entire penis inside your body?" The foreskin covers the tip of the penis to provide protection for it. A penis that is entirely or mostly inside the body is called a "Hidden" or "Inverted" penis and this condition is geneally a direct result of being overweight or obese. The penis is actually normal but is partially or wholly buried by excessive body fat. The obvious remedy for this condition is to lose weight.
It is inside the penis. It goes from the bladder and out through the penis so you can urinate.
inside his penis
They don't it's physically impossible There is a sexual activity called 'docking' in which a boy (or man) inserts the end of his penis inside the foreskin of his partner's penis.
Honestly... A penis is ment to be stuck inside if a vagina!! what else can you use it for?
There are no bones of any kind in the penis. The penis sits over the pubic bone, but this bone is not inside the penis. Instead of bone, the penis has a special spongy-like tissue inside it, with arteries and many tiny blood vessels in it.
It doesn't have to, but the majority of sex involves the penis inside the vagina.
What I think you are describing is just fat crowding around the penis and making it look like it is retracted inside. That is not bad for you.