oh if you're interested I've found what these are genital beads ^^ I'll give you some info (hum but be prepared for penis photos ╮( ̄▽ ̄)╭)
http://wiki.bme.com/index.php?title=Genital_Beading
heeeey safe info (no genitals there ^^) : http://www.thefrisky.com/photos/the-top-10-most-amazing-penises/amazing-penis-g7-jpg/
http://www.mangago.me/read-manga/hide_and_seek/an/hide-and-seek-chapter-2.html/17/
wtf is on seme-chan dick ? it looks kinda like a dildo ?...