Second Life is a multicultural experience, so sometimes things that make people laugh in one country only produce a raised eyebrow in another.
It may surprise some Americans to hear this, but the show Saturday Night Live is usually only viewed in the USA, so if Blue Oyster Cult comes on the radio and someone shouts “Needs more cowbell!” it’s likely only Americans will laugh. There are exceptions, but in general people outside the USA do not know about the cowbell.
Here’s a link to it for the sake of cultural enrichment. 🙂