Is it unhygenic to wee in the sink?

It's much easier for me to wee in the sink in my room than for me to walk to the bathroom. Is there anything wrong with this? Sometimes I worry that some of my wee will splash onto my toothbrush but then I think, hey, it's sterile, right? Is there any official medical or other advice about whether it's bad for your health to sometimes ingest negligible amounts of wee?