Plus, all satyrs are male, unless you decide to go against the myth (which has become more common as of recent years). While I wouldn't put it past the creators to have no problem including a male-only race, that leads to other issues. One of which is, if you have all-male satyrs, then you kind of have to have all-female nymphs (perhaps using the common trope of saying they're a single species). But even if you ignore the bit about nymphs being tied to a specific tree, stretch of water, etc. (which would make adventuring difficult at best), the myths have them as being blindingly beautiful--which almost certainly would go very, very wrong in early days D&D--and eminently have-sex-with-able (consent not always included, on either side of the equation).