Too much sensitivy…humm…plenty of threads about people complaining for loss of sensitivity. People is never happy.
More sensivity is good, as Sta-kool pointed. More sensitivy doesn’t lead necessarily to premature ejaculation. Jelqs for me worked both augmenting sensitvity and stamina; faster ejaculations only I experience that when I overwork.
That’s the same with Kegel’s: right amount, more stamina, too much -> premature ejaculation.
Manual stretching tends to reduce sensitivity - but also EQ.