Involuntary BC flexing?

[Drummer19]

I swear the instant I get aroused, and I mean the instant, I have what feels like an involuntary BC flex, and blood rushes to my penis extremely fast for a few seconds. Only thing is it doesn't feel like the "pushing out your crap" flex, but the BC still expands. It happens every time and I have only begun to notice it since doing reverse kegals over 2 months. Could this be a second reverse kegal of some sort, or mabey an isolated BC flex without the "I am gonna crap" push?

[Pegasus]

Four kinds of kegel, 2 standard , 2 reverse.

Standard kegel 1 lift your dick up and down ,stop your piss.
Standard kegel 2 Clench your butt,stop shit

Reverse 1 push piss out expands abs below belly button above penis
Reverse 2 expand area between balls and arsehole pushout action.

[Drummer19]

After doing some thinking, mabey this happens now because my brain is trained to do a RK right away...

[Pegasus]

Is it a reverse kegel back, or a standard kegel back?
it sounds to me like a standard back kegel.