'Don't let masturbation get out of hand'

My girlfriend tells me I masturbate too much and that it is hurting our sex life. I don't do it that often though. Is she right?
I don't know if she's right or not, because I can't comment on how she feels about your sex life. What I can say is that masturbation isn't harmful if it doesn't become more important than you being intimate with your partner. If you spend more time watching pornography and playing with yourself than you do chatting with or having sex with her, she may have a point. If it gets in the way of you doing regular things, she may be right. You are the only person with an answer to the question, so think about it a little.

My partner and I are in our 50s and don't have sex as much as we used to. I don't have a problem with it, but she feels we are too old to do it. I don't think anyone is ever too old to have sex. I think she's just being finicky. I don't want to force her, but I want her to understand what I'm saying. Am I wrong?
It all boils down to how you feel, to be honest. If you and your partner feel as if you want to have sex, and you are both physically capable of doing it, there's nothing on the planet that should prevent you from doing so, least of all the ridiculous notion that age is a deterrent. There is no rulebook about this. There are men and women copulating at 90, and having a better time on account of it. Yes, sex may be difficult as you both age, but physical intimacy in any form is always good for a relationship, so don't overthink it too much. You can't force your partner, obviously, but you can always get her to try and see things from your point of view. Communicate. That is always the key.