Probably to make mating easier, since they can protrude out on either side, rather than the snake having to reposition, or end up poking straight down into the dirt.
But genital shapes can be pretty weird in general. Just look at humans. Instead of a simple tube, they have a squishy plug thing on one end. They don’t even have a baculum to keep it straight, they just use hydraulic pressure.






Not really. It depends more on what wattage that the power supply can give, and what the laptop is willing to take. USB-PD is pretty smart, and will only give as much power as the laptop wants to take, up to the limit of the cable/power supply.
But if it’s capable of supplying the same wattage, it makes no difference if you’re giving it 65W by phone charger, or 65W by manufacturer power brick.