Belly touching

I know that people are super interested in pregnancy and feeling the baby move (I'm totally fascinated by it so how could other people not be interested?) but it is kinda weird when people touch my stomach.  So far, I've had friends ask whether or not they can touch it and I'm completely ok with this but I've had some casual acquaintances reach out and touch my belly - that's just strange! I'm not really sure why people think that it's ok to do this without asking but it seems that there is just something about being pregnant that makes people curious.  I knew that it would happen and I wasn't sure how I would feel about it but it's not as bad as I thought. It still catches me off guard when people immediately touch my belly when they see me but it seems like a nice gesture.  I'm more than happy to share the  whole "baby-moving" experience with those who are close to me, in fact, I think that it's such an amazing thing to feel and I want others to feel it too but the random strangers (which hasn't actually happened) and casual co-workers 'belly touching thing' is a whole other story...