This is fantastic fun, and I also. recommend this for even those in vanilla with full couples privileges engaged.
The key to this fun is to have the male partner go in first and then hold still, then have the dildo get inserted ....
Personal share:
The woman (soon to be ex) was a size queen, and I caught up with her a few years later in a bar with her guy (defensive end for my college football team).
She was in love and I knew he was packing from "fun times", but she told me that one time we did DVP she got off to and sometimes thought about when having sex with her current guy.
She laughed and said it is funny, I have a preference for my "kings", but FFS one white guy rocks my dream moment for life ... how ironic is that.
I wonder if she knew should could have had both what would have happened, but you know roads not taken ...