Erectile dysfunction (ED) is the inability to get or maintain an erection that's firm enough for sexual intercourse. It's also known as impotence. Watch the video to know more. Very interesting
https://www.talkinsex.com/media/dr-cherry-erectile-dysfunction-mp4.111/
Sexual intercourse was pioneered by a group of unsightly, long-extinct fish about 385 million years ago in Scotland, Australian scientists have reported.
https://www.indiatoday.in/world/rest-of-the-world/story/ancient-fish-pioneered-penetrative-sex-223891-2014-10-20