I think your glasses (and perhaps a bad boy smile) should be the ONLY thing you wear when getting that pie in the face (and perhaps some other pies in other places, as well).
Make sure the "Thrower" takes into account not to hit too,as they are generally expensive;and hurt,unnecessarily.Afterwards having got them:You can proceed as you want. .
A couple of points here. You'll enjoy it a lot better with the pie making complete contact with your face. There is the 'comedic' value of then removing your specs after you've been pied and revealing two circles of unpied face and some blinking eyes, but apart from that it sounds down right dangerous to me. How are you going to explain that one to your optician when you show up with cracked lenses!
I am all about WAM health and safety, but there is nothing sexy about a risk assessment form, so remove those specs and enjoy the wonderful feeling of having your partner plant a lovely deep pie in your face and rub it all in unhindered by pesky eyewear!