I prefer the slightly curved douche nozzle for self administered enemas because I can get into my sigmoid colon and it stays in place without having to hold it.
If I have someone administering my enema, I prefer a sizable colon tube or a large diameter nozzle because I enjoy feeling my sphincters being stretched to accept the size and my giver can move it around to stimulate the best possible feelings.
When I’m the giver, I consult with the lady I’m treating and use their favorite nozzles. Sometimes my lady will say, “Surprise me.” I love this because I have a nice selection of nozzles in various sizes length-wise and diameter-wise.
I also have double balloon nozzles, inflatable bulb nozzle, etc. I personally enjoy feeding colon tubes high up my ladies because high enemas are very erotic to me.
As a college student, I dated an older woman, an RN, who introduced me to erotic enemas, taught me how to enjoy repeated fillings and how to give a high enema - her favorite.
The women who are my enemates now have been with me several years and all three of them enjoy a variety for all the various sensations that are possible.