>>723806750
The most popular tag in all of straight porn, ever since porn existed, was big dicks. It's so ubiquitous that it's included by default in anything not explicitly tagged as the opposite. If you're confused as to WHY this is, all you need to do is understand how associations are built in the human brain.

When boys reach puberty and start becoming sexually active the first thing that happens is when they become aroused their penis becomes bigger. So every time they have a big penis, they are aroused. They've been looking at their own dick do this for years. Associations aren't simply one direction. Arousal -> big dick, and then almost always eventually big dick -> arousal. It's the simplest conditioning that exists. The bigger the dick is the more arousal they feel. It's not that they're sexually attracted to the dick itself; they're aroused at the idea of more arousal.