Sex causes a momentary cessation in breathing; you may have noticed this when you orgasm. Theoretically guys; if on top doing the work can to cough afterwards to "catch their breath". So it is normal. Secondary, take a look at the physiology of what sex is; your pupils dilate, heart rate increases, respiratory increases and sedates briefly, blood pressure increases, endorphins, hormones and others are flying all over the place; muscles produce adrenaline, pancreas and liver kick in to provide enough sugar to continue and; the big one - a lot of blood goes to your genitals. After sex, that stops. The body needs to return to it's norm; think of it as after you are scared or upset and then you calm down. Blood needs to go back to your head; we refer to it "after glow". The feeling of awesome directly after sex when you lie there. Coughing can increase the speed of blood flow as it thrusts blood to the brain; see coughing after fainting. So it's Normal. No fear my friend. As for feeling sick that's possible dehydration. And yes Pat has a point, sex is very very bad for us: if you presented to a hospital like that they'd think your dying. If it wasn't so much fun we might have stopped along time ago. But, it's nit a naturalistic homophobic thing Pat. Whoever you speak to is clearly an idiot.