Yes, those that engage exclusively in heterosex often times do "explore". But keep in mind grasshopper, that the anus is to the homosexual relationship what the vagina is to the heterosexual relationship.
With that in mind, I posted a couple of articles about the risks of anal sex in part 2:
Anal cancer may be on the rise in the U.S
March 22, 2013
"(Reuters Health) - The number of people in the U.S. with anal cancer has tripled since the 1970s, according to a new study that suggests rates of detection in high-risk groups may partly explain the rise in cases.
A U.S. cancer database search found that the rate of anal cancers went from approximately one person per 100,000 between 1973 and 1996 to three people per 100,000 between 1997 and 2009.
"I think the literature has already shown that there has been an increase in anal cancer cases, but we were surprised to see how dramatically it increased," according to Dr. Lily Lai, the study's senior author from City of Hope in Duarte, California.
According to the American Cancer Society (ACS), about 7,000 people will be diagnosed with anal cancer in the U.S. in 2013, and about 900 will die from the disease. The most common type of anal cancer by far is squamous cell carcinoma, which accounts for about 85 percent of cases.
For the new study, Lai and her colleagues analyzed trends in the 11,231 squamous cell carcinoma cases described in a U.S. database for the years 1973 through 2009.
They saw a large jump in 1997 - in the 23 years before that one, 4,224 people had been diagnosed, compared to 7,007 people in the 13 years afterward.
Although both sexes saw an increase in anal cancers, the rate for men jumped most dramatically - from one in every 100,000 men to three in every 100,000. That compared to the women's rate, which rose from 1.4 in every 100,000 women to about 2.4 in every 100,000.
Lai told Reuters Health that the major increase in cases among men was a novel finding, and her team suspects it could be due to more men getting screened more often, especially men with human immunodeficiency virus (HIV)."
http://www.theologyonline.com/forums/showpost.php?p=3402592&postcount=32
And then this one where I discussed the risks of anal sex with Art Brain:
Speaking of buggery:
In the general population, anal cancer is a rare disease.
Few people knew about it before Farrah Fawcett made
public her struggle with the illness.
Among men who
have sex with men (MSM), and especially HIV-positive
MSM, the incidence of anal cancer is significantly more
prevalent and increasing annually.1 However, the majority
of gay and bisexual men know little about the
disease, have never been tested for it, nor know that
screening tests exit. Health care professionals, too,
remain divided on how and whether to screen for it. In
fact, a standardized screening protocol for anal cancer
does not yet exist.
Each year anal cancer is diagnosed in about two people
out of every 100,000 people in the general population.
HIV negative MSM are 20 times more likely to be
diagnosed with anal cancer. Their rate is about 40 cases
per 100,000. HIV-positive MSM are up to 40 times
more likely to be diagnosed with the disease, resulting
in a rate of 80 anal cancer cases per 100,000 people.
Anal cancer is caused by the same strains of Human
Papilloma Virus (HPV) that cause cervical cancer in
women. HPV is the most common sexually transmitted
infection.2 There are over 100 different types of HPV,
although only several strains are believed to increase
the risk of cancer. Approximately 75% of all sexually
active adults acquire HPV, often within the course of
early adulthood and without any symptoms.3 Among
MSM, it is transmitted through both protected and
unprotected anal intercourse, and through skin-to-skin
contact.
Among heterosexual women, the vast majority
of infections are cleared naturally by the body within a
few years, usually by age 30. This appears to be less true
for MSM, where the infections are often still present in
later adulthood.2
Anal HPV is present in approximately 65% of HIV
negative MSM and 95% of MSM who are HIV positive.
http://www.theologyonline.com/forums/showthread.php?t=90740&page=482
Regarding women that have anal cancer: Keep in mind that lesbian's who play with sex toys also will be effected by this disease.