Snape, ignore FB message. Don't even bother replying to Ex.
And I agree maybe hold fire on the photo to Nameless.
It's a funny thing, I have sent somewhat risque photos of myself to men in the past (underwear and lots of cleavage, baths with lots of bubbles, that kind of thing) but I can't see myself doing that with Cuthbert at all now even though I did send him something along those lines before our date in December. Which I think is maybe a bit weird of me...!