First, the soldering iron will definitely take care of the problem and probably allow you to save your hard earned dollars on that vasectomy you were thinking of. (Greedy urologists!). Next they are hemangiomas, not angiokeratomas (if such a thing exists.) 3rd, you seem to have a large cluster of them, a bit unusual. You might want to talk to a dermatologist about them, just in case you have something a lot more exotic than just the skin lesions. Generally speaking they are harmless, become more numerous as skin ages, and whatever you do, DON'T nick them when shaving. They bleed like a stuck pig.