We have eyes. I'm not naive enough to think my husband and I have known each other 29 years and he's never noticed an attractive woman. As long as he's not ogling them, flirting with them, pursuing them, etc., I have no problem with that. I know I notice attractive men. We even joke about it playfully.

When your relationship is solid, respectful, loving, and trustful, a spouse noticing someone really shouldn't be an issue. Look, but don't touch, so to speak.