"Let's not be L-seven" means something like let's not be square (i.e. lame) - as L7 together almost looks like a square.
Apparently it's a slang phrase from the 50s, which is often mistaken for being a reference to the sexual position which is called 69.
"Let's not be L-seven" means something like let's not be square (i.e. lame) - as L7 together almost looks like a square.
Apparently it's a slang phrase from the 50s, which is often mistaken for being a reference to the sexual position which is called 69.