I've been soaping for almost a full year; and I still worry sometimes about gifting, simply because there's always a small chance someone will have a sensitivity or allergic reaction to something in the soap.
How do I handle it? !) I always use a piece of every batch of soap in the shower, and at the sink (for hands) several times. 2) bars are labeled with ingredients. Ugly labels with large letters...no fine print .3) I always tell people they're handmade, and to always test any (store bought or otherwise ) product with a patch test first. That comment has on occasion scared a few people off, but so be it.
Honestly, there are fewer ingredients in my soap, than any store bought. Unless someone has a specific allergy, there's less likely to be a reaction to my recipe because of the simplicity of the recipe.
Oh, and there are soaps that I scent with essential oils that can be an issue for delicate body parts....mints, lemongrass, clove, cinnamon, etc. I am very choosey who I give those too. None of those have caused an issue in the shower with my delicate body parts, but I still only allow close friends to have those bars....people who I can explain this too and know they hear and understand. For example, I have a friend who love spearmint....she requested I make a loaf of spearmint eo soap for her as strong scented as possible. I did - used the max amount of spearmint, also with eucalyptus to boost the scent.
But she knew the risks, and proceeded with caution (and had no issue). I make a different soap for her young son...gentler amount of spearmint eo.
Hope that helps. I'm sure they'll be lots more good information coming your way from others soon!