...that's where I'd draw the line. If she needs me to swim in the red river to help ease her cramps a little, I'd probably do it on the condition that I get to sport warpaint like a warrior about to plunge into the thick of battle. Drinking from it... no thank you.
In college, I saw one of my friends after he'd drank from the red river and he looked like something out of a horror movie; his beard was all gory looking. It took me years to unsee that.
EDIT: But lemme tell you, tampons can be a punk or metal musician's best friend (along with duct tape.) Why you ask? Moshpits. This one dude told me a story where this guy took a massive elbow to the face and this girl shoved two of her tampons up his nostrils.
EDIT 2: My 3rd choice superpower would either be accelerated healing or "oculus reparo" to magically fix eyeglasses like Hermione does in Harry Potter. Why? Moshpits again.
as a punk rock dude myself i have had this conversation a couple times, we tend to go for crude humor. my roommate and i have talked about the embarrassing super powers the power to give someone diarrhrea on command or vomit or orgasms.
i think my super power would be to be a ghost at will. imagine walking though walls, invisibility, telekinesis, talk to people in their dreams, ability to absorb energy from electrical sources being able to push your emotions on someone, possession and maybe some understanding beyond humanity all rolled into one package.