Ejaculation of precum and totally sperm like substance

I have two questions: 1. When I become sexually active or think something about sex, I see some transparent fluid (precum) coming out of my penis. Do I have to perform ghusl after that and wash my clothes? 2. When I urinate, sometimes I noticed a sperm-like fluid coming from my penis, its color is white and it is also thick like sperm, but I do not feel any type of pleasure as I feel during ejaculation, do I need to perform ghusl?