No. Some people can find that weird and some can argue it's not apropriateappropriate to do personal hygiene onin the kitchen but that's notno different onin Europe or North America IMHO. Just talk it with your roomate and maybe you can getreach an agreement. I can guess the need can arise in a small apartementapartment with lots more people than bathrooms. If your room mate continues to disagree, propose to use a bucket.
Edit: Yes I live in Brazil and hashave lived here for more than 30 years in many towns in Northern and Southern regions. Also has traveled a lot and know a bit of the main cities like São Paulo, Rio de Janeiro, Salvador, Curitiba, Porto Alegre, etc.