white is normal, so you could have an infection, or you could just not be eating healthy. best way to know is to visit your doc, or look up semen color resources online

hm. This is the way it has always been for me since puberty and I'm 22 now. So, because of that I never really thought anything of it until now. Since it seems my libido is dropping and sometimes I have sharp pains in that area. Is this a serious issue?

could be serious, could be nothing. Everyone is different and unique, however, if you are having sharp pains, medical attention is needed as soon as possible. It could be something serious, so please have it checked out.