Low-dose

Much discussion in the US over Rick Santorum backer Foster Friess’ ideas on birth control -

"This contraceptive thing, my gosh, it's such [sic] inexpensive," Friess said on the show. "Back in my days, they used Bayer Aspirin for contraceptives. The gals put it between their knees, and it wasn't that costly."

- which hasn't yet touched, as far as I can see, on the salient point that it's not actually workable; if the only restrictive rule is that the woman's knees need to be touching, there are a wide range of fucks that are not only possible but possibly improved. I shall refrain from adding photos.