That’s why you get a bidet! With a bit more pressure they work like an enema. Just relax, fill up, purge, repeat. It’s great to combat mild constipation. Prevents butt slime - when you go and the last bit of poop refuses to come out, then slowly leaks out as you walk around.

There are cheap $20 ones that work fine. That area of your body isn’t particularly sensitive to cold water.