Heres are some lyrics from Pictures of Lilly by The Who. Definately about masterbation.
Don't think they mean anything else in light of recent events.


I used to wake up every morning
I used to feel so bad
I got so sick of having sleepless nights I went and told my dad
He said, "Son now here's some little somethings,"
And stuck them on my wall
Now my nights ain't quite so lonely, in fact I
I don't feel bad at all I don't feel bad at all

Pictures of Lily made my life so wonderful
Pictures of Lily helped me sleep at night
Pictures of Lily solved my childhood problem
Pictures of Lily helped me feel alright
Pictures of Lily Lily, oh, Lily
Lily, oh, Lily Pictures of Lily!

And then one day things weren't quite so fine
I fell in love with Lily
I asked my dad where Lily I could find
He said, "Son, now don't be silly.
She's been dead since 1929."
Oh, how I cried that night
If only I'd been born in Lily's time
It would have been alright

Pictures of Lily made my life so wonderful
Pictures of Lily helped me sleep at night
For me and Lily are together in my dreams
And I ask you, hey, mister, have you ever seen
Pictures of Lily?