Although they look real, I doubt they are. First, someone else would had to have taken those. No chance these are his self pics hacked into on a computer or cell phone.
That leaves two choices, a guy or a gal. No woman would find it sexy for a guy to be stroken one out on the computer. No hetero guy would really want her to take such a pic. If Drake is going to let a sex tape go, it would involve him banging the holy hell out of some screaming hottie.
That leaves the question of whether another guy took this pic. I have not heard any gossip or rumor that he is gay. I find it unlikely that he was drunk enough to be stroken one out with a bud and let himself get photographed. Even more unlikely, that a buddy who could get close enought to take these, including the one where he is posing, would then distribute the pics. Basically, this makes no sense. Why would a star with a bright future let someone else photograph him like this? For that reason, I believe these are photoshopped. Damn good photoshopping, but still fake. It simply doesn't pass the smell test.