and yes kisses are definitely in order, but in that case I need to know if Frank has retracting fangs and if so in their normal state how sharp are they??

Uuuhhhhh... I didn't put that much thought into it. Non-retractable fangs might be inconvenient for certain activities, other than kissing, so I vote for retractable. And as sharp as you want them to be.

Also, new idea... since we have vampire!Frank and priest!Matt, wouldn't it be fun to have vampire-hunter!Peter? Who very much disapproves of this arrangement between Frank and Matt, because that's what Peters do.