these were almost my exact thoughts after reading original poster..nd plus i dont think bro sis should be too physically affectionate with each other..where do u see these things usman?
yeah guys having sisters has no correlation with them having better relationships with their fiance/wife..in fact iv seen lots of cases where its opposite
sisters r the best..sorry to say dear u r missing out on a lot..even just my sisters presence near me alone makes me feel better nd more happy for some reason i just cant explain it