It was the year 2020 when the aliens arrived. They didn't show up with guns or lasers, they didn't shoot down the statue of liberty or ask to speak with earth leaders or anything like that. They came relatively peacefully.
Their planet suffered from pollution and sickness resulting in most of their people dieing except a small group of females who wandered the galaxy looking for a compatible planet and mate species before they died out. Earth was the first planet that had both the natural resources (the right air, water, nutrients, etc) and a species they found to be genetically compatible.
The invasion was barely noticed, some ships were seen in the night sky but they didn't draw much attention to themselves, this was a peaceful integration mission. To colonize the earth they just wanted to hook up with some human males, blend in, and live mostly quiet lives among the natives.
But since the survival of their species was at risk they couldn't leave anything to chance so they developed a drug that would turn men into their most ideal. They would get more muscular, stronger, more hormones, bigger dicks, and of course become dumb horny guys who thought with their dicks, just the perfect breeders and protectors. If one of the aliens dated a man who wasn't already like this she would use the drug and make him so.
The following are stories of men who's lives have changed due to the silent alien invasion