Well, the undisputed way to not be a fool with such brothers is to swell up in the bath (pardon, "in the sauna") and cause a fool. That’s why business is like this... blatant.
to whom?
We, for example, when one of the roof directors went (or watched the series, I don't know) and offered the partners a scene and girls, the partners said O_O and the owner:
Please do not invite them to negotiate anymore.
Sanitary and wholesale trade.