rap some tight selatape round the foreskin:], i do it often, it actuly works, you get a better longer feeling:D
In warm, moist conditions, it could be for days.
After ejaculating.
Outside the penis it is only minutes. Inside a vagina 4-6 days. It can also be frozen for future use.
It reduces the man's strength
Same as when he was 60.
my penis.
Technically no, but since sperm are microscopic you can't always know if any has. You can become pregnant without the man ejaculating though -- the precum (when the penis sort of "leaks" a little bit with arousal or as he approaches orgasm) contains sperm, and this is more than enough to get you pregnant. This is why the "pullout" method of contraception is so ineffective.
Regardless of the star sign, a man can be insecure about his penis.
No. Unless by "grapefruit", you mean "a man ejaculating into a woman's vagina", in which case the answer is yes.
There has been nothing, other than surgery, that has been proven to permanently increase the size of a man's penis. No there is a few things you can do , remember the penis is a muscle just the rest of your body work it out and you will see increase in size..
The size of a man's penis is very variable. Each man is different. Some have smaller ones, and others have larger ones. Also the size of the penis when flaccid, is in no way related to the size of the penis when it is erect.
There is no specified length that a penis should be in order to fit a woman. In fact, a woman's vagina adapts to accommodate the size of a man's penis.