How do hemorrhoids change how you conduct yourself in this hobby? I with a girl recently that hit me pretty hard.....I thought I would return the favor. She is mostly a top but bottoms for me every now and then. She told me she recently started getting hemorrhoids. That can not be good in this hobby.

Just go to your doctor & have yourself checked.

Hemorrhoids are common ailments. By age 50, about half of adults have had to deal with the itching, discomfort and bleeding that can signal the presence of hemorrhoids.
Fortunately, many effective options are available to treat hemorrhoids. Most people can get relief from symptoms by using home treatments. Bowel habits, physical stresses, and other conditions can raise the risk of developing hemorrhoids or make existing hemorrhoids worse. Some of these factors can be prevented.
Things that increase your risk
Constipation or diarrhea that does not go away. These conditions may lead to straining with bowel movements.
a. Being overweight (obesity)
b. family history of hemorrhoids. You may inherit the tendency to get them.
c. Being age 50 or older. Half of people who are older than 50 seek treatment for hemorrhoids.
d. Pregnancy and labor and delivery. As the fetus grows during the last 6 months of pregnancy, blood volume and pressure on pelvic blood vessels increase. The strain of labor also can cause hemorrhoids to start or get worse.
e. Liver disease, heart disease, or both. These conditions may cause blood to back up in the pelvis and abdomen.

Hemorrhoids may be made worse by prolonged sitting or standing. This may cause blood to pool in the anal area and increase pressure on the veins.
Frequent heavy lifting or holding your breath when lifting heavy objects. This can cause a sudden increase of pressure in blood vessels.
The veins around your anus tend to stretch under pressure and may bulge or swell. Swollen veins (hemorrhoids) can develop from an increase in pressure in the lower rectum.  

Hemorrhoids are more likely as you get older because the tissues that support the veins in your rectum and anus can weaken and stretch with aging.
Your doctor may want to do a more extensive examination of your entire colon using colonoscopy. This might be recommended if:
Your signs and symptoms suggest you might have another digestive system disease
You have risk factors for colorectal cancer
You're older than age 50 and haven't had a recent colonoscop

getting a good pounding up the ass, which I imagine would be a risk factor (?). After a lovely young lady on these boards gave me a nice round I experienced chronic itching, seemed external, rubbed cortisone cream in the area for three or four days and the itching stopped. I'm neither a doctor nor an expert on this subject.

even after many years of asses pounding hard or even fisting etc. So, I guess, that's sort of chancy (50 -50 chance).

But you get the idea when I said " Swollen veins (hemorrhoids) can develop from an increase in pressure in the lower rectum." I don't have to state the obvious.

By a Medic to make sure you dont have and STD like Venereal Warts....