Bangladeshis always have positive and welcome attitude towards foreigner and openness to Hospitality.
(In many cases a low-caste person cannot hand you a glass of water, rather they put it down in front of you for no contact is possible.) Generally in this regard Bangladesh is better than India in so far as it is less caste-ridden, however they do ultimately come from they same Hindustani culture so it gets expressed.And also according to custom it is considered impolite. Touching someone when speaking is not common unless the relationship is become more close but this is not acceptable in case of female.Politeness and courteousness are desirable and prevail among Bangladeshis.Normally shaking hands with a male, using the contemporary expression of goodwill, i.e. " "good morning" "good evening" etc is appreciated. Eye contact is not unacceptable whether male or female.It is important to note that the female in Bangladesh normally shy to have an eye contact with male at the first meeting.which village, do they continue to farm, how many brothers and sisters do you have, etc..)An offensive subject would be anything that strikes at their national pride.