I have held pins in my mouth my entire life until I started teaching my GD's to sew. As for putting them on my clothes...did that too but only on the right side. I always held my babies on my left shoulder.
When I was sewing with my 201 Singer I always had a thick piece of wool wrapped around the top of it to stick pins in. I have not been able to figure out where to put a piece of wool on my Pfaff or Brother ULT until tonight. I like the hint of using velcro for the pin cushion to be fastened to the machine. It should work just as well with a pad of wool. By using wool pins do not rust and the wool fibers keep pins and needles slick and sharp.