Mouse in the house is when your penis is too small to have sex with a girl, so for her pleasure, you tie the tail of the mouse to your small penis and have sex with her.
When a persons nose hair becomes visible on the outside of the nostril it resembles tiny mouse whiskers. Most extreme cases are commonly seen on the elderly, where the whisker length can reach up to 4 inches.
When you use the computer for too long with a mouse somewhat far away, your muscles in that arm and shoulder get tense and stiff, leading to soreness and tightness.
Looking at porn for 8 hours straight lead to some serious mouse arm in my nonjacking arm