I surely never assumed you to be a ruffian which would be two steps away from a gentleman.
“A cad is a man who is aware of the codes of conduct which separate a gentleman from a ruffian, but finds himself unable to quite live up to them. Cads are quite capable of disguising themselves as good chaps for some time, only revealing their true nature in circumstances of particular stress or temptation. Others embrace their caddishness wholeheartedly and delight in behaving in a manner which is, to be quite frank, not cricket.”