I remember an interview of Bryan Ferry when singer of the Roxy Music band. He was asked why do you always put half naked girls on the covers of your albums, and Bryan to tell "because it multiplies the sales by a factor of ten".
Other parelthondology that maybe you don't know, Nescio
And "the biggest rock star you've never heard of", a irreducible who began his carer before you and me were born and is still here today. The only one song I can hear from him. Johnny is still able to fill an entire stadium. Respect. (note that the lyrics are important, again)
Here below
Why no more than 2 youtube??