Can you 'learn' ADHD symptoms?

Loaded question, but spouse (without ADHD) has been with partner for 27 years. Have noticed decline in focus and attention among other things in spouse without ADHD all similar to symptoms exhibited by spouse (with ADHD). Is it possible for some of spouse's ADHD symptoms to rub off on partner without ADHD having been around each other so long? Picking up similar habits...obv not actually having the medical condition as that's not how you would get it, but losing patience/attention with things, moving more when supposed to be seated, similar to spouse as a LEARNED/OBSERVED habit... Thoughts?

If so, any thoughts on how to counteract this, aside from not being around the symptomatic spouse, which is not going to happen? LOL

TIA for any constructive input.