WHats going on with my hair?. Help

[rov]

Hi everyone, I am 24 years old and have naturally thin hair since always but I noticed that when my hair is greasy and sweaty it shows more of my scalp, is this normal or I am experiencing hairloss?. Why does my scalp show more when the hair is greasy than when my hair is washed and clean?. I think I have always noticed this so it my be normal dont you think, in pics I took 3 years ago it show the same thing. Thanks

 

[Esprit]

Looks pretty normal to me, Everyone's hair looks more see thru when greasy or wet, but that looks like a normal parting to me, in both shots