Hi, I have a 16 yr old belgium, and he is always hanging. Someone told me he does that because he has a pit in his sheath. I have never heard of that. If that is correct, how do you get it out?
Your Belgian (not Belgium; Belgium is the country where the breed originated) needs his sheath cleaned at least once a year. Some need it cleaned more often, but once a year is the bare minimum.
If he has a bean (not a pit) it can affect his ability to urinate properly, which can lead to infection.
Google sheath cleaning. There are any number of written as well as video instructionals.
One word of caution; if you've never cleaned a sheath before, either have the vet do it or someone experienced with geldings. You're liable to get your head kicked off otherwise.