
SBT's are a bullbreed so that generally means they dont get on with same sex situations with any dog, but plenty of people on here know people who have even tho I would never take that risk personally! :)
If you get a bitch SBT that would fair better for your male dobe, and they should get on OK as long as you supervise the play and let them know each others boundaries.
However that doesnt mean she will like
other dogs, thats just something you may have to deal with in getting a SBT, usually theyre friendly enough but some just dont like other dogs plain and simple!