Great advice given above. Just my experience from having a male and female Dobe...their play is rough, but the female is always considered to be La Jefa (The Boss) so she controls intensity and duration of play. PIA Spock, very vocal, likes to tease Eva to get her to play with him (His premise: "Any attention is good attention!) Eva & Spock at Home Interaction 2019
Two male Dobes, like Spock, living together in same household would just be too much intensity and might lead to a SSA incident, IMO...
I'm not saying that male Dobes can't play together, if known and supervised, successfully.
Here is a video taken in 2012 of Spock (2.5 y/o then) and new aquaintance, Leroy, at HADR Doberfest in Houston, on their horse farm.
You can see how intense, even though well intentioned, their male-male play can be. Spock Plays With Leroy at Doberfest
The Doberfest event is held several times/year for adopting out Dobes and for
previous adopters to bring Dobes back for some play in the horse corrals.
It's a real trip to see all the Dobes behaving well, since it's a neutral ground for all. Only saw one stink-eye incident during the whole morning event w/ BBQ.
Spock Recall at Doberfest 2012