By Kayla Kibbe Despite being at this advanced stage of my career as both a person who writes about sex for the internet and one who has most of that sex with men, I still have a few questions about penises. Most of them just have to do with the day-to-day logistics (and, I would imagine, challenges) of having your junk just hanging out all the time (as opposed to people with vulvas, whose reproductive organs are neatly tucked away in a much more civilized manner). For example, I’ve sometimes wondered how you penis-havers ride a bicycle without crushing your genitals. As it turns out, I guess y…