Sensitive ares of the ?

Was looking at a wb site on the anatomy of the with diagrams of the sensitive area. Would like tio do some research on thatand need to ask you guys where the most sensitive area is. Is it on the tip of the glans around the urethral opening, is it the whole of the haed, is it the frenulum or just under ther coronal ridge. I have a 4 skin so for me thats the hot spot