I think that for many (maybe most) basenjis they are not very sexual beings until breeding season. We tried to collect Querk once out of season, and he was like, using an in heat St. Bernard 'uh, no…she stinks, and keeps whapping me in the face with her tail!' we tried the next season with an in season B bitch, and he gave a huge, healthy sample
So, he was never a humpy, testosertone dog until maybe the second breeding season. And then only when a neighbor dog was in heat or something. After we had females that started coming into heat, he did become difficult to live with during the season. He tied once with Blondie long after she was out of heat, because she just stood there @@ ! So he has bred naturally..and he has been collected several times. And once he was neutered just about every bit of humping went away. In fact, this season when Blondie was in full bloom..she started humping him!!! We were talking about paybacks being a you know what
So my answer to your question is, no, I don't think collecting him will make a bit of difference in his behavior