How could a female suck your dick and you not want it, or prevent it from happening. Not many women would have the strength to tie a man up against his will, therefore, if he was to be tied up....he probably wanted something in the first place.
I don't know...I can understand a guy getting a boner for no reason, but if a guy is not turned on by a woman, or just flat out doesn't want to do anything with her...how could he get hard??? I don't see how he could even if he were scared shitless. I mean...how many guys here get hard when they are scared???