The problem is that trying to define doctrine in the LDS church is more difficult than nailing jello to a wall.
The problem with the LDS church is the gaslighting in which the leadership denies what previous leaders had taught.
But all of that is a hijack and I have no doubt that media reports are overblown concerning this trend.
Penis in vagina, yeah. But my bet is that the supporting role of bed jumpers are the stuff of urban legends.