We all know Cosmo gives TERRIBLE advice to women, like, all the time. This one might take the cake though – a “tip” on how to measure your guy’s manhood “without him noticing.” Via BuzzFeed:

“Want to know how your man stacks up? You can’t exactly bring a ruler to bed, but you can ‘accidentally’ drop a Sharpie in his lap. The average erect penis measures 12.7cm, about the length of the iconic marker.”

Yes, you know how very normal and not weird at all it would be to be carrying around a Sharpie with you… when about to hook up with someone. SMH, dude.