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To avoid open nicks and cuts on the hands it is best to trim and file nails with an emery board. File fingernails well in advance – preferably a day before to allow small nicks and cuts on the hands to close. To test the sharpness of your fingernails, run them across your tongue. If they feel sharp, smooth them. Check for nicks and cuts on your hands and arms. A sharp stinging sensation when lightly rubbing alcohol on the skin is a clear indication of ‘non-visible’ abrasions which can increase the risk of STI/ HIV transmission. Hand sanitizer also works well for this, take off your jewelry to reduce the risk of cuts. Allocate enough paper towels per person before you start the session to avoid transmission of any STIs such as Hepatitis C and if you are using conventional terry towels use one per person.
You can never have too much lube. Water-based lube like KY dries out too fast, J-Lube is a good water-based lube. Crisco (a lard-type oil-based cooking fat) is used by many fisters but, like all oil-based lubes, it weakens latex condoms and latex gloves. A lubed finger is inserted into a well-lubed arse, and then several more fingers follow, adding extra lube each time the hand moves in and out. When the sphincter opens wide enough, the whole hand goes in, with thumb pressed against palm, fingers pointing forward. A clenched fist-shape can usually only be made once in the rectum (the first space past the arse hole) is reached.
It is important not to rush things and just relax, take your time and have fun. Avoid sudden movements when inside him and always pull out very slowly to avoid injury. When your hand first enters the arse, the sensation is like being fucked by a large cock, but more powerful. Most cocks aren’t wide or long enough to do what a fist can; fill the rectum, prod the far side or go through the lower colon; so taking a hand is much more intense.
The further you go in the arse, the more delicate the internal tissues and lining in the rectal or colon walls become. If his arse clenches, wait for it to relax before pulling out very slowly to avoid injury. Then try gentle in and out movements, without pulling out totally, and changing speed, angle and depth. The fistee’s groaning will let you know whether to pause or press on. Change hands to test different angles if necessary. Fisting, especially if too quick, can tear the lining of the inside of the arse.
Remember: The same lube container shouldn’t be used when several men are being fisted. Blood from one arse (maybe too small to even see) can contaminate the lube and end up going into another guy’s arse. Furthermore, once you have started fisting someone, don’t touch anything else apart from his arse and his lube; any surface you touch once you have started (sling chains for example) can potentially become contaminated with the Hepatitis C virus. If it is inevitable to touch other things, discard the gloves if you use any and use a new pair. If you do not use gloves, wash your hands or sanitise them thoroughly.