They never keep them on

[Byron]

Well put Louis - and I think we have another problem with definitions here, along the lines of "when is a speedo not a speedo?" (as so recently discussed and well summarised by Torchwatch).

I noted Crail's words "..........enjoying sensual pleasure (not sexual)........"
as very significant here and I would guess from your post that your enjoyment expectation would be similar if not the same as his.

That brings us to the dividing line between sensual and sexual and no doubt there are as many views on that as there are guys enjoying their pleasures in a variety of ways . So many factors play a part - there are preferences
for video action, beautifully posed pics,stimulants for masturbation (visual and medicinal) ,for toys, vibrators, locations, physique, alone, with partner, always naked, clothes fetishes, body part fetishes, cock worship, instant cum, edging, frotting, docking (and no doubt many more I need to be reminded of).

Most blogs on the internet are reasonably short and mostly obvious in their content. Larger websites can be very extensive in their subject matter however and so that everyone does not go mad in viewing swathes of material to locate their particualr interest we are offered categories or channels or tags or indices.
This is simply to narrow down the process of selection of what is on offer
and it is clear from crossovers that webmasters often have difficulty in placing a particular vid. firmly in one category.

I would suggest that those guys who search "sex video" will mostly expect penetration. For the performers to start in speeedos will usually be OK but viewers will subsequently be impatient for action. Some videos can respond immediately to this need and others will have long lead-ins. Those looking to enjoy sexual action between two naked guys
are not likely to be too happy to wait through 90% of a long video in anticipation of the eventual removal of speedos.

The porn video makers try to cater to the need for ever more erotic scenes
to be more exciting than the competition but the divergent tastes of others such as yourself are likely to be left at the wayside in the process.