1. A sexy demon chick with wings, horns, and a gothic leather dominatrix getup, complete with 4-inch heels.
2. "In medieval legend, a succubus (plural succubi; from Latin succuba; "prostitute") is a demon which takes the form of a female to seduce men (especially monks) in dreams to have sexual intercourse. They draw energy from the men to sustain themselves, often until the point of exhaustion or death of the victim." --Wikipedia
The young boy masturbated to a picture of a succubus in his Diablow manual.
Lemures are the least of the Baatezu. A lemure is a gelatinous mass of flesh, extremely resilient to attacks. The only way to harm one is with an enchanted weapon. They are too stupid to think, and are typically used as meat shields by the Baatezu in their war against the tanar'ri.
The only thing making a lemure more dangerous than a goblin is the fact that they can't be harmed by ordinary weapons.