There's a lot of porn out there:

• Porn sites receive more regular traffic than Netflix, Amazon, & Twitter combined each month. (HuffPost)
• 35% of all internet downloads are porn-related. (WebRoot)

There's also a lot of flavors of porn.  From kink to vanilla, from midgets to size differences, there are so many different kinds.  

I personally tend to be pretty vanilla.  I like straight guys (of course who doesn't fantasize about the hot straight guy??).  I like bareback (but don't recommend it for real life practice).  I sometimes like cartoons (have you seen our comics collection??).  I like twinks and jocks and hunks.  I like rough, sweet, tied up, and passionate.  

But what kind of porn gives me an instant stiffie?  That's a pretty naughty secret.  

There are two types that instantly make me super hard:

1.  Daddy / son - There's something that's so wrong, yet so hot about a daddy son pairing.  There's a mix of trust, power, domination, and family all wrapped up in the taboo of family sex (or at least the fantasy of it).   Here's a secret link for registered members.  

2.  Sexy Straight Guys - Okay, dont judge me.  I know this is THE most vanilla gay porn there could possibly be.  But hot sexy hunks with muscles who want to goof off with football and end up breeding each other's hole (and liking it too!).    

What's the ONE kind of porn that makes you so hard it hurts?