He showed me his tests and his is healthy - should I be concerned still?

[Geminize]

Just remember that if you think your partner is being monogamous with you and you later find out that he isn't, you won't be the first to be completely shocked, blind-sided, and devastated to learn that. Only your own delusion can convince you that it can't/won't happen to you.

Whenever there is a murder, rape, or other horrendous crime and the suspect is a quiet priest or family man next door and people say, "I've known him for years and he could NEVER do that!" I just role my eyes and think, here we go again. People never learn.

I think monogamy IS possible between two guys, but for me it would take a lot of trust-building first. Even then, of course, there are no guarantees.