Diapers for me are a great turn on, either in a giving or taking situation.
It certainly adds to the fun, especially if another is involved, up to now ive only had it done a couple of times, but seems its going to happen more in the future, having met a lady on line with similar kinks !
Has a lot to do with the naughtyness of it, that its something we arent meant to do any more since we grew up.
suppositories obviously work well, as does soap, there being no water involved, but a small enema, say a litre or so works fine for me, as the diaper can contain that amount.
I have done bigger enemas, but restricted that scenario to when im lying in the bath cos there will be a mess !
That obviously is a consideration, the person helping to administer etc, has to be ok with the clean up, no good bottling out at first sight of poo !
Can imagine it can bring two or more people very much closer together after experiencing such a dramatic clean up of each others bodily functions too.