What if Drake is always sad because When he was in Degrassi, he got shot in the spine?
This led him to become paralyzed from the waist down and confined him to a wheelchair.

Because of this, he could no longer attract women. This made Drake very sad and affected him in his future life as a rapper, which can be seen in Drake's sappy, tear-jerking, no-I'm-not-crying, type of lyrics.

I was listening to Drake when I was in the shower And after I was done, I realized I never really turned on my shower and that the water was my tears.