Breaking up multiple metafields in order confirmation

I am a novice HTML coder trying to print an order metafield in the order confirmation email my customers get. I got that down with

{% for line in line_items %}
  {{ line.product.metafields.my_fields.event_date }}!
{% endfor %}

However, if the order contains two items with different respective inputs for each of those metafields, I am wondering how I can include an and or an & between the two metafields printed. I assume there is a way to write an if statement that will make it work, but I just simply don’t know how.

Thank you so much in advance.