The idea of any change being called evolution means the word no longer communicates to the vast majority of people.
From where did the horny male wasp come?
Most young males are that way. Don't need a lot of prompting to get horny.
But in all seriousness, males are horny because in nature the horniest males tend most to pass on that horny male characteristic to the next generation much more so than non-horny males. The reason for this should be obvious.
