I think your cock is going limp"
No that's normal oh so sorry.
You can't beat it fast enough.
Your balls cramp to much?
Is there a lot of cum in them?
The spunk is to thick it's blocked.
Take your balls twist them.
Twist till it hurts hold them.
Hold in that position and count to 30.
Let go and repeat .
Jerk 30 strokes, Twist hold 30 seconds