Maybe alcohol? I generally don't drink for religious reasons, but I have heard other people refer to alcohol as a "social lubricant". I think the way it works is that alcohol temporarily makes you stupid, and therefore more tolerable to modern scum.
Alcohol can work but is not ideal for most of us. In my case, if I reached the blissful state of stupidity required I would be unable to and not interested in performing sexually. For more borderline cases it might work to some extent. Perhaps some party drugs would be better.
I thought about this some more and I don't think this will work because people today aren't just impulsive because they lack self control, but because they have specially evolved impulses, which would be difficult for a person without them to replicate. Have you ever seen the way impulsive people move their whole bodies in sudden and intricate ways when they speak? It's not something you do just because you lack self control - the impulses must also exist within you.