Is it necessary for husband and wife to perform ghusl straight after intercourse?

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Check below answers in case you are looking for other related questions:
Is it essential when doing ghusl for janaabah to wash with soap?
If he touches his private part during ghusl, does he have to repeat wudoo’?

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He did ghusl with the intention of doing it for Jumu‘ah and he forgot about doing it for janaabah; did it remove his impurity?
Can he do tayammum on intensely cold days in the case of janaabah?
Is it essential when doing ghusl for janaabah to wash with soap?
If he touches his private part during ghusl, does he have to repeat wudoo’?

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