I washed my Bench. jacket, and yellow stains appeared?

It is a white jacket, that's really thin


the stains are only on the sleeves


I washed it with only whites, no bleach, cold water





What do I do? The jacket is really special to me, and I really really have to get the stains out...I washed my Bench. jacket, and yellow stains appeared?
What material is the jacket made out of?? Kind of important to know that before anyone can give advise. Some materials cannot be washed - some you can use bleach, others you cannot....I washed my Bench. jacket, and yellow stains appeared?
That's sperm. Don't worry about it. Makes your jacket more special.