Can a dog get pregnant without the two getting stuck together?

I have 2 dogs, my male dog is only 8 1/2 months old and female is 22 months old, My husband says the 2 dogs dont have to get stuck together in order for her to get pregnant, is his true? I dont seem to think so but I could be wrong.

OH YEAH AND FOR YOU WHO SEEM TO LIKE TO COMMENT THAT THERE ARE ENOUGH DOGS TO ADOPT,,,,,YADDA YADDA YADDA, I DONT CARE. We are animal lovers and plan to keep every puppy she has and if she has too many then they are going to family members, SO KEEP THAT CRAP TO YOURSELVES.

I am just asking about the dogs gettting stuck together in order for her to get pregnant, if you dont have an answer for that then dont comment. THANKYOU