I got a friend as well who looks to be too horny when her periods hits here, but generally girls get irritated to such kind of sexual activities at that time, anyway not everyone is similar here so its okay to be like that as well.
I heard that she loves to fingering even at her periods but most boys don't like that kind of fingering so masturbation is the only solution.
this sounds like a Maniac in sex and not like what OP is asking, imagine fingering with the dirtiest blood flowing here vagina?
that is so Yucky and if i ever knew that woman? trust me she will never have another face to look at me lol.