No issue for me - I always took DS in with me, asleep or awake. When he got mobile, he'd come in anyway!
My theory is that he has virtually trained himself to use the toilet because we've shown him how to do it. He never had a fear of the sounds of the toilet or the idea of the toilet flushing because he just got used to it whilst in the sling
Sling worn babies pick up on social norms and conventions far quicker than pram babies because they are involved in the interactions at adult level. As well as all the other well-documented advantages of baby wearing