They are beloved by many and dwell in mountainous regions and forests by lakes and streams.
Although they would never die of old age nor illness, and could give birth to fully immortal children if mated to a god, they themselves were not necessarily immortal, and could be beholden to death in various forms. Other nymphs, always in the shape of young maidens, were part of the retinue of a god, such as Dionysus, Hermes, or Pan, or a goddess, generally the huntress Artemis.
Tight Fraenulum Much like people can be tongue-tied, you can also be dick-tied.
Sometimes your foreskin isn't the issue, it's the elastic band of tissue connecting your foreskin to your shaft.
We all know boners are full of blood, but the penis can't handle much blood flow.