To @Nomad-Diver and others who route DOWN through a hole in the crotch of their undergarment: Do you also make a hole in the crotch of your baselayer/underwear? Routing UP has the advantage of allowing the hose to exit the waistband of one's baselayer/underwear--no hole needed in the crotch. However, routing up was uncomfortable for me. I would like to experiment with routing down, but I don't like the idea of making holes in my wool baselayers, fleece pants, and other things I wear either by themselves instead of the jumpsuit undergarment in warmer water or as additional layers in colder water.
Down, with a loop in the hose to help provide flexibility for any movement, and then out.
I stabbed a hole in my undergarment for the hose exit, and then took it to my local tailor (who's used to scuba-related work from me) to stitch around the hole to prevent it tearing further. The "loop" is between the outside of my undergarment and the inside of the drysuit.