Actually not. While beer is generally promoted as a "manly man" drink, it's anything but. In fact, drinking too much beer has a potential to turn a guy into a girl. According to this article, beer contains phytoestrogen which lowers testosterone levels in a human body, but makes estrogen levels higher. Hence the growth of "beer gut" and "man boobs".
It's not all, unfortunately. Beer also contains barley, which is a prolactin, the hormone that promotes breast growth in females and lactation. While alcohol in general has a tendency to decrease testosterone level in males (WARNING: language), beer seems to be especially damaging.
How comes then that beer got its "macho drink reputation"? Here the story gets somewhat tricky. Originally beer was brewed using such plants as yarrow, bog myrtle and marsh rosemary which were both mentally and sexually stimulating and Germanic men used to drink it before going into battle. Strange enough, it was Catholic Church which had monopoly on its production. German protestants being both anti-Catholic and apparently of a more puritanical bent, took a law forbidding to use sexually stimulating herbs while producing beer and substituted them with hops instead.
(According to Wikipedia, the process of substituting the traditional herbs with hops started earlier than the Reformation, though).
Interesting enough, according to this blog, Ancient Romans didn't care for beer and preferred to drink wines and mead instead of it. So guys, considering the information above, think twice before you open that beer bottle/can:)