My brother (in his forties) lives with my mother. When I go round he is often just wearing shorts and no top. I feel uncomfortable when he kisses me in greeting and said to him today ‘are you going to put a top on?’ He then imitated me using a high pitched squeaky voice, I guess to put me down. Am I being unreasonable to find it odd of him and to feel uncomfortable when he is hot , sweaty and bare chested?