CroquisCafe Is a series of videos on Vimeo and Youtube made specifically for artists to learn to draw the full anatomy (that way you don't have to watch porn, which I don't recommend getting a virus on your computer, just use CroquisCafe, it's free, it's safe) they do poses that you would actually draw, like riding on bikes, or interesting foreshortening shots, all with real models who are in a variety of weights, ages, and ethnicities.
Also, if you're just wanting to memorize anatomy proportions, look into Andrew Loomis (just do a google search, maybe add "male anatomy" to the search) and you'll get a ton of reference of artistic anatomy that has easy to break down proportion tips. Back in school I would go to the library and look up "artistic anatomy" and there were always several books available (so you may want to go to a college library, but I remember once I found an artistic anatomy book on animals and it was like the holy grail, so cool)