My girlfriend and I have recently decided to research more into bdsm, as we've been dipping in and out of it for a while and now want to get more serious about it. We've both got a fetish for blood (not menstrual), but want to keep things safe and clean. We've got hold of some sterile injection needles (22g) and sterile safety equipment (bandages, wound cleaner etc.) Cutting sometimes isnt practical for us so we have started to "take blood" using the needles through the vein on the inside of the elbow. Is this ok to be doing? We always apply pressure after taking to prevent bruising and also clean said area. We usually let it drip out but find the blood clots in the needle cap and stops play, is there any way we can get around this? We were thinking of collecting the blood in medical vials, is this possible and for how long can they be kept? As newbies to the site we would just like the opinion of more experienced people to guide us in the right direction.