Interpersonal health

some study looked at why humans would have sex with each other (survey.. anyone have a bib referenc?).....

the study found... something like...

sometimes for pleasure... sometimes for power... sometimes control... sometimes intimacy... but... also sometimes to SPREAD an STD.....

to spread a disease intentionally....

due to ANGER? HATE? JEALOUSY?

so these emotions can perhaps affect disease transmission.....

what about unintentional spread of disease?

forgetting to wash hands....

fecal matter in the water on a beach...

how could examining the INTERPERSONAL aspects of health be used to REDUCE the incidences of pathological contagion and the overall incidence of disease and suffering?