The problem with Qualia Lenses is that they are always the same. Once you've experienced the qualia of a given environment, it becomes the same experiences over and over again. The lack of variation can be a killer to one's enjoyment of the experience, like hearing the same song over and over again. The Stored, being the ones most victimized by this, came up with their own solution: Sex.
Not the organic procedure, naturally. The Stored already had plenty of simulations for this, and the sexvirts were just as repetitive and artificial as all the other Qualia environs. This form of sex was a sort of algorithmic process that required two datastructures to sympathetically interface on the datastructure level. It utilizes a genetic algorithm for symbiogenesis - essentially, bridging the two intelligences into temporarily one intelligence and allowing "bits" of the cognizence of each to drift into the other. While this is being done, qualia are induced into each. The qualia being induced into one filters into the other through the bits of cognizance being distributed between them. This produces an infinite pallate of variety in a very short span of time, as the specific datastructures being shared will completely modify the experience.
Naturally, datacourse is only ever supposed to be performed by the consenting. The questions that come up about allowable practices are manifold. Most people find it wrong, for instance, to practice datacourse on one's own familiars (not the least reason being that unless the familiar is particularly complex it will collapse under the pressure, the lost bits having no redundancy for the familiar to remain viable). It is also a fact that as the two become more and more "involved" (having datacourse over and over again), they will begin to pick up characteristics of each other as they have been literally sharing each other's experiences while they are involved.
Tech Levels: CogniTech 6, MetaTech 5
Cost: Varies, though low-cost versions will tend to have side effects (too much datashare, datacourse addiction, etc.).
Descriptors: Dataform, Procedure
For those wishing to have a tangible effect of datacourse, consider the fact that active memetic attacks (even ones that aren't supposed to target more than one individual) can be transmitted "sexually". Also, the GM might wish to allow frequent partners to exchange one or more points of Themes, or even Theme descriptors. How much datacourse is required is up to the GM.
Always remember to practice safe datacourse.