Yes. Either is quite acceptable!
Back and forth in the direction of propagation of the sound waves.
it's called frequency. it can go up and down or back and forth
it is a vibration :)
Yes.
Yes.
Back and forth in the direction of propagation of the sound waves.
When the penis is between the breasts and the breasts is used as a vagina.
it's called frequency. it can go up and down or back and forth
turning back and forth down the slope
vibration
it is a vibration :)
vibration
vibration
Short of suggesting that you see a doctor about this, It sounds as though it is unable reach its preferred position. this can be the result of the skin surrounding it not being free enough to move up or down the outer shaft of the penis. If you are uncircumcised you should be able to expose the gland at the end of your penis by pulling the skin back and of it' If ti is too tight to pull back you need to just keep worrying it until it does ie keep gently pulling the skin back until it moves freely back and forth over it. If this is not the problem A docktor will soon let you know how to fix it.
The US and North Vietnam. US jets bombed the north; the north shot them down. (Back and forth; back and forth).
Yes.
Yes.