I find that the more exercise I get, the more regular and painless my periods are, and the less PMS Tim suffers.* I too am an evil toxin inserter, though I have suffered chafing issues on longer rides.
I've considered mooncups, but given my fat fingers, retroverted uterus and long fingernails mean I can't insert an applicatorless tampon, I figured I'd have no chance with a silicone
BUKKIT.
Oh, and progesterone-only pills? Yup,
TEH PHAILZ.
*Though I don't know why I'm five days early this month. Probably 'cos today I'm wearing white tights and a white-lined dress which is dry-clean-only.