1) Having read a few posts related to the question, "Is masturbation harmful?", most of the answers I've seen seem to suggest that the only possible harm could be psychological, in the sense that masturbation may be a distraction from one's normal routine.

What about the actual PHYSICAL side effects? Some things can not be dismissed as mere "wives' tales"! For example, when I masturbate often, I do notice a darkening under my eyes. I am only 28, but having been at this a while, it does seem as though I can not as easily become erect, or stay erect for as long as I used to. I may not have grown hair on my palms, but I have noticed (and I'm willing to concede that there may be no causal relationship here) that I have become somewhat hairier, in all the wrong places.

Please set the record straight as to what, if any, harmful PHYSICAL side effects may result from masturbation, and why, in the face of my testimonial and no doubt countless others, such symptoms as I have described are dismissed by yourself and your peers as "myths."

2) Does masturbation affect your growth if you are not yet fully grown?

Just wondering if Vaseline is an okay form of lubrication... I notice that the container says, "for external use only," but I am wondering if this includes vaginas! Thanks. You're hilarious.

I have started "cock-stuffing" in the past year or so. I use a glass thermometer and insert it into my urethra. I know that this is wildly dangerous — as the glass could break — but I thought it safer as it is manufactured very smoothly.

I know other men who use a variety of implements — pens, markers, tubes, etc., but I have only done it a few times — and it seems that the glass — while not safe as it could break — is safer as it must surely be smoother.

I use my own saliva as a lube — as I am not sure if a personal lubricant — i.e., Wet, KY jelly, or the like, is safe. Not that putting a piece of glass into your urethra is all that safe to start with.

My question — in the end — is personal lube okay to use? Is this a common fetish — I don't do it often — and it doesn't seem to affect me adversely afterwards.

Thank you for any light you can shed on this.

I was wondering what exactly a cock ring does? And has it been known to be effective at what it's supposed to do? I have seen them in several places and have been too shy to ask exactly what their purpose is.

I'm 18 years old and have never had sex. But three years ago, I started masturbating. And this past week I have been having swelling in my vagina. You can't get any STD on your own, can you? I'm scared to go to the doctor because I don't want my Mom to know I have been doing this. Please respond.

What does one do when they are desensitized to their vibrator and need to check a consumer report before investing in a new one?

1) I'm not an inexperienced girl at masturbation. I've been doing it for a very long time, but actually only ever discovered what an orgasm was when I was 18 and got my first vibrator. This never bothered me because I wasn't sexually active then, but now it does. I realized I have NEVER been able to orgasm from physical touching or from just using fingers. I've always needed a vibrator of sorts and this is worrying me for future relationships and stuff with partners. How can I learn to orgasm from touch instead of vibration? I've tried before and have always just gotten frustrated or fallen asleep.

2) I've sorta been curious lately about what it feels like to do the big M using my fingers. I'm uncomfortable doing it though. I can't even use a tampon let alone do THAT with my fingers and I don't have anything that vibrates. What other options do I have?