No, but it can seriously damage your skin. If you have any worries what so ever go and get checked out by your GP.
Stretch it tighter - the higher the tension on a drum head, the higher a percussive note it will sound.
No
You can make your bra tighter by adjusting the straps. You can also put the back strap on the hooks that are the furthest from the end of the strap.
The size to get for running shoes should be one size less than your regular shoe size. Tighter fitting shoes are best for running.
The molecules of collagen and elastin are unlikely to penetrate the skin because they are too big and the skin is too hard. Some advertisements can imply that these products work because they will make the skin tighter but only for a short period of time.
How is skin used in running track (What the #@%$* do you mean)
No they have no impact on the vaginal muscles.
When you tighten the skin of the drum the sound will go higher
The lyrics are from the song called Tighter, Tighter by Alive 'n Kickin'
Faster Air, tighter lips.
a grease is to make a recorder holder tighter