I am not a medical professional or certified sex educator, my answers are based on extensive reading, working as a peer sex educator, and when I genuinely don't know, deferring to professionals who do know.
Random question, but if I were to use an anal douche would I fill it with water?
Mixed feelings here. Generally I wouldn't recommend douching or enemas to begin with, but if you are going to I would probably recommend water unless you know what's in the enema fluid you buy. Some kits contain laxatives that induce shitting (because for real am I going to say defecation?) while others are for more gentle cleaning. As with anything, know what you're putting in your body before you put it in. The rectal lining is fairly permeable to chemicals and things since a huge part of the lower colon's function is reabsorbing water (this why being on the receiving end of unprotected anal sex is one of the riskiest behaviors for exposing yourself to STIs).
Mixed feelings here. Generally I wouldn't recommend douching or enemas to begin with, but if you are going to I would probably recommend water unless you know what's in the enema fluid you buy. Some kits contain laxatives that induce shitting (because for real am I going to say defecation?) while others are for more gentle cleaning. As with anything, know what you're putting in your body before you put it in. The rectal lining is fairly permeable to chemicals and things since a huge part of the lower colon's function is reabsorbing water (this why being on the receiving end of unprotected anal sex is one of the riskiest behaviors for exposing yourself to STIs).
The rectum also is not meant to have hard stuff up in there which is why during anal play you go slow and use lots of lube. For similar reasons enemas and anal douching aren't usually recommended for normal activity because they have the potential to cause micro-tears to the rectal lining. Most brands of enema kit or anal douches say to use their product at least 30 minutes prior to any activity in part to help with this, it's a similar concept to not brushing your teeth at least an hour prior to performing oral sex.
But at the same time, I recognize that for some people poo is ew and they don't want that as even a remote possibility. You can help things flow so to speak, by eating a well-balanced diet with lots of fiber and water. Usually a shit followed by thorough shower about an hour before anal play is enough. But if you use an anal douche or enema kit, make sure you follow the directions and definitely don't make it a daily habit.
On to the next question!
Sometimes after I masturbate my penis stings for a little while, like in the urethra. Eventually it goes away and I have tested negative for any diseases. It only happens sometimes. Does this ever happen to you? Do you know what I'm talking about? Should I see a doctor?
This is one of those questions where I repeat several times that if you aren't sure and are still concerned, go see a medical professional.
Sometimes after I masturbate my penis stings for a little while, like in the urethra. Eventually it goes away and I have tested negative for any diseases. It only happens sometimes. Does this ever happen to you? Do you know what I'm talking about? Should I see a doctor?
This is one of those questions where I repeat several times that if you aren't sure and are still concerned, go see a medical professional.
If you regularly test negative for a variety of STIs or UTI (urinary tract infections) or trauma, and the stinging feeling isn't an intense burning, you probably don't have anything to worry about. To help the sperm survive in the vagina, semen is slightly basic which can occasionally be an irritant to the soft mucous lining of the urethra. This usually manifests as a need to pee after ejaculation and most people with penises experience this to some degree after ejaculation. A variety of factors from diet to hydration to how many times you've jacked off in the past few days can have effects on this, similar to the things that can cause changes to consistency. If you have no weird discharges and have tested clean, it's probably nothing.
In very rare instances men can be allergic to their own cum, but that usually shows up like a flu after they shoot. Definitely doesn't sound like the case here, but in the interest of comprehensive information I'm including it.
There, the most complete answers I can give to these questions. Don't make me regret posting this, and for the people who have asked me questions, sorry I used your anonymous questions without permission. If you found any of this post to be heteronormative or trans*exclusive, please let me know and I will try to correct it.