having gotten sliced down there last year, for the first few weeks afterwards it was painful to get an erection, and the amount of times you get the horn at night would surprise you.
Even though I'd been warned by the doc before the circumcision, I left with the assumption that it would be fine, with the morn-horn only, but I was awake 5-6 times a night at least, often more and it only got worse the longer I went without!