1.How you can posit the endeavor with a reasonable expectation of success.
2. How your partner can decline in a polite and indirect (yet firm) manner.
3.Whether things might be weird afterword.
How'd that work out for ya?
She said she wanted to try it but then all of a sudden she was afraid. of course I said I'd be gentle.
Of course, but that didn't work, did it?
No. Then I reminded her that I bought special lube, condoms, and even a guidebook. She then reminded me that she had mexican for dinner, but we tried it anyway.
Nice work! So how was it?
As it turns out she likes it... but I don't.
Yeah, that's the Backdoor Maru for ya.