You hear a man talking to a group of people who are going on an expedition into the rainforest. What does he advise them agai

Man:   Because you need water for various reasons, you often end up making your overnight camp by a river. Providing you take care to keep insects away, this can be as healthy a place as any. Much as you might feel you need a good wash, one trap not to fall into, though, is the use of soap or shampoo. These may make you feel good, but actually give off unnatural smells in the jungle which act as a magnet to insects, thus increasing the chances of your getting bitten. Better to actually go in for a dip, being careful to dry off and re-apply your anti-insect cream immediately afterwards.

Sue:  What do you mean, Mary, when you say, ’I never invite friends round to my house?’ No, sorry, I can’t accept that. I invited everybody round here for a party on my last birthday, remember? I was going to cook something special for you all and then Henry and Mark insisted on taking us out to that new Japanese restaurant in town. It’s true that I accepted their offer, but I thought it would be very rude to refuse.