It exists. Look up "micro penis", its an actual medical condition
Speaking of medical conditions, if that girl tries to fuck that guy in the last picture in the OP post, she's going to die. There is no way for her to take even 1/4th of that without rearranging her organs, regardless of what hole she attempts to use. That guy has the literal opposite problem of a micro penis, but his chances of getting laid are exactly the same, because anyone willing to ride that thing would, once again, probably die. Actually, on that note, the guy with a micro penis probably has a better chance.