pure lead, like any pure metal, is tasteless, but many salts of lead are sweet, so corroded lead can taste sweet, and also the white lead pigment that was used in the past is sweet.
There are several other metals whose salts are sweet, including beryllium and yttrium, which is why an alternative name for beryllium was glucinium, from the Greek word for "sweet".
There are several other metals whose salts are sweet, including beryllium and yttrium, which is why an alternative name for beryllium was glucinium, from the Greek word for "sweet".