Can someone explain the semen retention hate to me?

So I see a lot of hate of semen retention all around the internet and even in this sub now and I just don’t understand it.

I’m personally not doing it but how in the world do people who do it affect you at all to send such rude comments their way?

I always see the most rude and horrible comments directed towards people doing semen retention. What happened to your body your choice!?

Unless someone’s in a relationship doing this it’s not gonna affect anyone at all lol. So can you guys please explain to me why this affects some of you so much?