I have had the opportunity to be the giver, so to speak, three times over the phone.
As I have related elsewhere on the board, I convinced a young woman to use a jet of her whirlpool bath while we talked on the phone. For those who haven't read that, I hope it is okay to quote from my previous post:
She had learned to pleasure her front on the jets of water (something that caused her to come quick, hard and repeatedly), but had never tried it from behind. I had no idea if this would really work, having never tried anything like it myself, but it seemed like it would.
I talked her into backing up to one of the jets so that she could feel the water against her anus. It was disappointing that she had to put the phone down on the side of the bath after I instructed her to back up further, spread her cheeks open, and relax her anus by pushing out slightly. However, even with the sound of the whirlpool engine and the bubbling of the bath water, I could still hear the mixture of shock and moaning in her voice as she felt the water shoot up her ass.
It did not take long to do the job. The water also wanted to come out about as fast as it had gone in. She actually managed to grab the phone as she leaped out of the tub and dashed across to the toilet.
I heard the first few blasts of water and feces. She was moaning hard while suggesting that maybe this hadn't been such a good idea. Eventually it was cramping so bad and she was shitting so hard she had to hang up.
Afterwards, she decided that her tastes in anal play were more definitely limited to solids rather than liquids.
The second time was with a woman with whom I had a fairly intense phone-based Dom/sub relationship. She used to spank herself to the point of crying on my instruction and she enjoyed anal play, especially putting in butt plugs of ever-increasing size.
I got her going in the direction of enemas and she noted that she had some Fleets in the cupboard. I made her get one out and take it. I'm not sure why she didn't bother to tell me ahead of time that she suffered from diverticulitis. She took the enema, but it set off severe cramping and that kind of killed the mood. It took her a couple of days to recover fully.
At this point, I was not having much luck with phone enemas.
Finally, another phone friend (who eventually became an occasional in-person friend) took an enema and enjoyed it and came, both while she was taking it and afterwards. It wasn't long after that I met my wife and my phone sex experiences (with anyone else at least) ended.