I was talking about how drekir perceive and go about f/f sexuality a while ago and so now we're flipping it around to the sausage fest side of things, how, when and why drekir go about it and perhaps some cultural examples that are a bit more specific of course for this one, its a couple of scorchers on a break from wandering the colombian plateau to burn some bodily fluids
As drekir are promiscuous and tend to get down and dirty a lot as well as engage in group sex. It should not be a surprise to hear that the average drek is gonna hop on whoever is willing and happy to have a good time and drekir don't usually have much of a care about the sex of whomever they're jabbing organs into
Though of course there is a broad range of preferences, most every drek is gonna probably sleep with someone of the same sex often enough. Some do it more, some do it less but they all do it
Now particularly with male sexuality
Males tend to make sex related decisions mostly in regards to perceived beauty, availability, and how they wanna feel as of course different ways of doing sex are gonna feel different for a drek. And unlike females they don't get pregnant which, while a mild impact on a females life, does often impact how they go about selecting who they have sex with exactly. Males tend to not exhibit as complex a chain of decision making considering that eggs aren't in the equation. It mostly comes down to what sort of experience they're feelin up to and the beauty of someone (or many people) in question. Some mornins ya got a craving for a female, sometimes a male, sometimes you want to plow and sometimes you wanna get plowed. Now of course that will eventually lead a male to another male, be they denmate or stranger, to get busy

Now with some biology and how they do it

Drekir have pretty large penises I think that is obvious at this point. It does have to be due to the fact that they have a large hip bone that's in the way in order to actually make proper penetration. While it is a soft organ that is still a lot of meat, deflated or not, that needs to be kept somewhere in the body until it's ready to use.

Like Females, males have a cloaca that has two paths, one for the anus (don't touch that with drekir) and one for their sexual organs. Of course where a female has their business, males have a "Phallic cavity" that is essentially a cavity (similar in size to a females uterus) that holds the penis when its not in action. As a male gets aroused the penis starts getting filled with blood and the glands start puffing up, pushing it out of the cloaca.
So when a male is getting penetrated (generally by another male) That is where their partners penis is going assuming that they're doing good ol penetration. Usually the penis needs to push past their partners penis into a cloaca that is not nearly as pliable or flexible as a females.

So the male penetrating gets some pay off as a males phallic cavity is notably a vice tight type thing, different from a female (hence why males often seek it out, different experience) and everything gets squeezed up further as said male keeps shoving past their partners own penis. So there is also just a lot of rubbing.

For the male getting penetrated arousal mostly comes from the sensations of having someone rifle around and fill up the phallic cavity, as well as all the rubbing up on both their own penis as well as all the connective tissue within the cloaca is also particularly gratifying. Of course its common for males to masturbate while getting penetrated to help get them to the end of the session
Of course as a phallic cavity isn't really meant to hold onto or push out fluids and is kinda just an emptyish cavity during sex, its pretty messy. Males tend to produce more pheromonal ejaculate than females on top of that so you tend to see quite a messy result, even compared to the already puddle forming male/female type deals

So yeah there you go, a niche question noone asked but I answered