I've done all the tips, but I cant seem to get my sim abducted. He stargazes through the telescope every night from 6 to 4, he has space rocks EVERYWHERE on his lot, and there's no one else on the lot...
Try having space rocks in your sim's inventory. My sim had 5 space rocks and he used telescope to search galaxy. At midnight, he was abducted by aliens. And this was first male pregnancy in my game, too.