ANSWER:

It seems what you are referring to is mathi or prostatic fluid as this is what comes usually when a person is excited.This is impure and requires washing the affected areas and renewal of wudu.

What requires ghusul is mani or semen. This comes out in a gushing manner, accompanied by desire and sensational pleasure when coming out. 

If husband kisses on regularly basis or touches his wife many times during day and if some discharge comes does ghusul becomes mandatory…

Purity | January 22, 2019 6:48 am
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If someone constantly prayed salah in the state of junub or without performing ghusl while knowing its haram, how do they repent from this? should all the prayers be repeated? even though the number is unknown? please help as they are trying their best to repent from all the haram that has been done.
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Someone saw stains of semen on clothes but doesn’t remember that he saw a erotic dream. before he slept there was thunderstorm and lightning. in the morning he thinks that it might be that he got afraid or felt cold that is the reason of semen. so should he perform ghusl?