Been doing this for montherinos now.
Getting horny = Strong vibrations and tingling in my prostate.
Doing kegels = Weak waves of pleasure spreading all over my lower body.
Doing a lot of kegels = Strong waves of pleasure spreading all over my body.

It feels so fucking good, but it can get very distracting.
Like popping a boner in the middle of a conversation or while walking on the street.

I've had (partially) involuntary prostate orgasms while talking to my co-workers. My prostate randomly flares up and cries for attention, so I instinctively do kegel contractions.
Masturbating and then ejaculating with my cock makes it go away, tho'.