I am referring only to male homosexual infection rates Jack.

The church defines marriage as between a man and a woman exclusively

I suppose the infection rates for totally monogamous male homosexual couples would be nil.....if you could find one.

Various studies have shown male homosexuals to have large numbers of lifetime sexual partners, over 100 is common some give figures of over one thousand.
Even in "committed" relationships monogamy among male homosexuals is not common.