A person's mood can be heavily influenced by hormonal fluctuations in their monthly cycle, especially before menstruation. Your girlfriend might feel happy at one moment, and within a few minutes she could be in tears. This can be frustrating for you as...
If you want to be a guitar god, you need to have a properly tuned guitar. Whether you want to tune digitally, by ear, or with harmonics, you can learn to tune a guitar easily!