Ejaculation of precum and totally sperm like substance

I have two questions:

When i become sexually active or thinks something about sex, i see some transparent fluid (precum) coming out of my penis. Do i have to perform gusl after that and wash my clothes?
When i urinate, sometimes i noticed that a sperm like fluid coming from my penis, its colour is white and it also thick like sperm, but i does not feel any type of pleasure as i feel during ejaculation, do i need to perform gusl?

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