How many calories do you lose by chewing food like veggies or fruitsor digestingand by having sexual relations?

Okay, chewing. I promise you that it's something so minuscule that you'd burn more by getting dressed. [And since I think this is kind of related, there are NO foods that give you "negative calories" as in digesting them requires more energy than they even contain.. that whole thing about celery = total myth]

Sex:

Sexual Activity, Active, Vigorous Effort: 82 calories/hour

Sexual Activity, General, Moderate Effort: 71 calories/hour

Sexual Activity, Passive, Light Effort, Kissing, Hugging: 54 calories/hour.

Source: Calorie Count Plus, great site.