Getting away from the talk of nipples ...
Then lock this thread, it is all about those...
Do you have a recipe for the blood you used here?
Sure do!
Tamiya Clear Red with a small hint of black (not ink, you need color for the goey effect) that you let dry a little (be careful, this stuff dries fast) then you staple it on. Follow that up with a small staple of Clear Red with an even smaller hint of black (you can use brown) that you do not let dry.