I guess one could use the excuse that telling would mean u not getting? but everyone has a right to know what they are getting involved with. I'd let whoever know bcuz I'd pretty much be most happy to know in advance if they have
something. Before I became more responsible with my sex life...I would just hope the condom did a good enough job. I do yearly checkups now n ever so often im still a lil unnerved while waiting for the results(that plus my phobia of injection needles, so its all that n more

)...especially if it was the case where someone who went before me got bad results.