Bodily fluids are a little less controversial than blood sacrifice over here in the US. People might be grossed out by them, but if they're scared enough or it's a big enough deal, practitioners who might be horrified at the idea of animal sacrifice will muster the courage to throw some urine or menstrual blood into something they're doing. And then there are those of us who wouldn't think twice about actually going out and pissing in the corners of our property to mark it as ours or asking our partner to ejaculate in a jar because we want to try an awesome sex magic thing.
These things are living parts of our selves, which makes them a really powerful tool and/or sacrifice. That doesn't stop people from yammering on about how horrific it is to use mingled sex fluids in a fertility ritual when you could use a rock and a leaf and call it a day. I'm in the camp that would paint fertility sigils on myself in jizz, bake vulva cookies to leave at the base of a sacred phallus, and anoint us with special infused oils before commencing the baby making. I'm ok with that. Maybe it's that it seems completely illogical to me not to use the
physical elements of life-giving that we have as part of more serious
workings. Have y'all ever asked deities about modern concerns like your body image or hangups? They're not going to suggest some nice tealights and massage oil and slow jams. They're going to wonder why someone with a nice big ass like you isn't out rutting up against the tree in your front yard where the neighbors can rejoice in your prowess and fertility.
I use blood in sacrifice and in workings sometimes. Maybe it was growing up is an alarmingly charismatic and literal Christian household where raining down the blood sacrifice on our heads and as protection was a normal thing to include in prayer. I don't know why it seems so ok, but it just does. Besides, I find that if I'm unsure about whether or not I should make myself bleed for a project, it will go ahead and stab me with a little sliver of something and take the sacrifice itself. I find that if I pray while I'm embroidering, it's the only time I actually prick myself enough to draw drops of blood while sewing. To me, that's a beautiful thing.
A note on animal sacrifice since it's part of blood sacrifice: I've never sacrificed an animal myself because I don't know how to kill humanely. I've never killed anything but an insect, so I'm not going to make that jump any time in the foreseeable future. It doesn't bother me in the least that it goes on. I try to take care of dead animals as I find them out here in the country. Bury them properly, help the spirit move on, leave offerings and blessings for it.