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1 - learn the difference between a rectal rinse and an enema.
2 - a plumbed-in (shower mounted) set up makes it all much easier.
3 - water shouldn't be too warm (or too cold). should be as close...

https://pbs.twimg.com/media/B2QvSNuCAAAsjPE.jpg

Dancing
http://divassf.com/events/sofia-ferreira-jane-marie

and escorting?
http://sf.backpage.com/TranssexualEscorts/ts-jane-marie/20538651

She's succeeding on her own terms - and doesn't care about how or who you want her to be.
I applaud that.

Why do you get to tell them what they are?
Why should they live by your definition of "trans"?

For your first time I would actually suggest cowboy.

Yes... anatomically doggy style or on-your-side is 'easier' but for most folks the first time is more about being relaxed the whole time than...