"Wonderful inventions that should exist in the future" imagined by foreign netizens

Monday’s morning is a little lacking in motivation. Let’s take a look at the “beautiful inventions that should exist in the future” that foreign netizens have come up with. You can choose quiet or chat seats when booking air tickets, and a mobile APP can judge car engine problems by listening to the sound. Condoms that change color in case of STDs. . . Thinking about the possibility of these inventions in the future, do you feel better or are you very speechless? !