What is the most sensitive area of a penis?

For giving a good hand job or b/ow job, what areas are the most sensitive and will give the greatest feeling towards an orgasm?

the area just below the head called the frenum.
google the word frenum and u can see pics of it.

this is really sensitive especially of the guy is uncut.
he can ejaculate by just rubbing this little piece of skin...

hope this info helps?

the head is probably the most sensitive
The top... I mean the head... At z back...
The frenum, which is the underside just below the head.
the top
The dick-head ,of course.
I've never heard of a frenum being the most sensitive part - that guy must have lost his glans in an accident! Mind you, the frenum really hurts if you catch your zipper on it!
the head it feels like heven every time she suck the haill out of it