A:Do you think water and oil will mix if they are dumped togther?
B:I don't think so.Abviously,they don't mix.
A:Any reason for that?
B:Well,water is hydrophilic substance while oil is hydrophobic.
A:What is the point?
B:The point is hydrophilic materials are only affinity to something that is also hydrophilic and the same for hydrophobic materials.
A:Can I have an practical example?
B:Sure,for example,sometimes we have to use oily marker rather than regular pen on some materials like plastic.Because marker and plastic are both hydrophobic.
A:That is good example.Thanks
B:You are welcome.