I know this is a somewhat controversial topic (HN notability) but I think this particular article falls easily within intellectually stimulating (no pun intended :)). Also it is high brow enough not to count as gutter reading (in my mind anyway).
Why? Is evolutionary psychology not HN material? If it had been an almost identical article but about a topic other than masturbation (grooming, social rituals, etc), would that have made it more HN worthy? Why or why not?
Life hacking.
Speaking of life, hacking together with someone of the opposite sex would be more productive than by yourself.
You can't always have filet mignon. Sometime you just gonna make do with a hamburger. :-)