Parasites are toxic junk best avoided.
I was stopped by an interviewer as I exited a shop today. “Could you spare a few minutes for my survey?” they asked. I said “no”. The interviewer acted as if I hurt their feelings, my reaction was indifferent.
I had just avoided a parasitic relationship, that is a relationship where I end up the loser. Had I agreed to do the survey it would have been a win for the interviewer, as they get paid for this, and a loss for me, as I gain nothing for the loss of 15 minutes of my life to a survey.
In nearly all cases the survey people, sales people and advertisements we encounter in life are parasitic, in which we lose and they gain from any interaction with them. These parasites on our time, energy and money are at least junk we can do without, at worst toxic to our well-being.
The best relationships are the trading sort, where both sides bring something of value to the table, and both leave the relationship a winner. The bee and flower in the image is a trade relationship, the bee gets the nectar and the flower gets pollinated.