Sexual Relationships 
Sexual Health Guys, why would a guy dick moves back and forth by itself after the guy get a bj or handjob?
Anonymous
Updates:
+1 y
I gave my boyfriend a bj and his d was moving back and forth straight up
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What Guys Said
(28)That's normal because when penis gets erection moving forward and also after ejaculation getting soft.
Oh so he got hard?
Yes specially when going inside tight pussy getting rock hard.
Its like that lol
Pelvic muscles.
We clench and the cock moves.
You did good job on him. It’s the blood flowing causing the throbbing and the dick saying “wow” you got me. It’s just like when it’s hard it will move periodically on it’s own. It needs stimulation. Kinda like when a girls clit throbs.
It’s pulsating and it’s also because of our heart beating while it’s hard, pretty normal
It's happy so it's waggin. Good job!