i dont think so. cuz all the blood is still in your peen, so havin it be tight like that would jus leave it there and keep you hard (thats all a boner is). cuz i hear that in movies, what some of the male actors do durin sex scenes, is put a rubber band around their junk. it stops the blood from goin INTO their shlong and givin em a woodie.
lolwut, have you ever tried having sex with a too small condom/rubber band on?