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Law: If semen left its origin through arousal but as it was about to be emitted, the man held his penis tightly, thereby not allowing it to be emitted but after some time when the feeling of arousal subsided, the semen was released then even in such a case Ghusl will be regarded as Waajib.
The ruling is based on this because even though it was not released in the state of arousal at the time of emission but because it initially left its place due to arousal.
