I Used To Masterbate With My Penis Up Against The

I used to masterbate with my penis up against the wall and putting all my body force on my penis.When it was soft I used to put my both hands on wall and climb it and lay my soft penis against the wall(on the edge of the wall) and masterbate .i have done this 10 or 20 times in my whole life when i was in my teens or before that(thats how i first learn abt masterbation) im now 24 is that kind of masterbation bad?There are no problems in my health i never get fever etc?Is that masterbation bad?