swmrh911 saidYour sexual orientation is not linked to your likelihood of developing cancer...and guys seldom develop cancer when they contract HPV. Regardless, gay guys can still contract HPV. Its not like we are a separate species with our own genetic maladies...
Sexual Orientation can increase the risk for cancer but not by genetic means as swmrh911 pointed out. The California Health Interview Survey from 2001, 2003 and 2005 from 7,252 women and 3,690 men who were diagnosed with cancer as adults found that gay men were nearly twice as likely as straight men to have had cancer.
One of the reasons given were that gay men were more likely to be HIV positive. HIV increases risk for anal, lung, and testicular cancers also the lymphomas like Hodgkin's disease.
Gay men had other risk factors for cancer such as cigarette smoking. A study published in 2009 in the journal Tobacco Control showed that 37 percent of homosexual women and 33 percent of homosexual men are smokers, compared with 18 percent of heterosexual women and 24 percent of heterosexual men.
Excess alcohol has been linked to various cancers.. A study by Dr. Michael P. Marshal of the University of Pittsburgh Medical Center revealed that LGBT teens are 190 percent more likely to use drugs and alcohol than are heterosexual teens, and that the usage rate is even higher among certain subgroups. For example, Marshal’s study, which was published in the April 2008 edition of the journal Addiction, documented that the prevalence of drug or alcohol use among bisexual youth is 340 percent greater than the rate among straight teens. Among lesbian youth, the number rises to 400 percent.
To address the OP's question..I'm not aware of any malignancy being more common in straight men. However I'm not an expert on this topic..Although not conclusive, some studies have shown that infrequent ejaculations may increase the risk of prostate cancer..http://www.mayoclinic.com/health/prostate-cancer/AN01825