I love comedy, the darker and more irreverent the better.
Inside the confines of a comedy club or on a comedy podcast where there is an unwritten rule that 'these are jokes, please don't take it seriously', that would have been a hacky toothless attempt at being funny, but at least it is still just a joke.
In an email to potential paying customers? ehhh.... pretty stupid and worthy of the ridicule. While they're at it, why not add something like 'have an asian look over your girl-math but don't let them drive you to the game' it's the exact same kind of hacky tired joke that stopped being funny ages ago (if it ever was?)
In my experience doing sales... most guys have to check with the wife before signing any dotted lines anyhow!