I found a topic on my usual forum about stds and many of the responses included how many partners and whether they had anything. One poster mentioned he had 10+ partners before freshman year of HS. This is an extreme sexual deviancy. What psychological reasons would encourage someone to behave this way? I have a bunch of speculations as to why that would be. He replied he simply liked sex, which (obviously) is what I expected him to think. Any thoughts are welcome.

Thank You.