No, the amount of testosterone lost during sexual intercourse is absolutely minimal, so it will not affect your training in any manner. The only reason why it is not a good idea to have sex before training, and I mean before training, not just on the same day, is because prolactin will raise after having sex, and this hormone at high levels makes you feel sluggish, like you don't want to do anything. This is why men get asleep after having sex.