Matthew 1:25 25 And knew her not till she had brought forth her firstborn son: and he called his name Jesus.
Joseph wasn’t instructed not to have any sexual relations with Mary after he took her as his wife. He had all the spiritual and legal freedom to “touch” her without violating anything. By his own volition, he did not. His act factored in affirming a major prophecy about a virgin being with child, a prophecy which could be interpreted in many different ways. And it was not an act that he needed to “sacrifice” for a day; he patiently held off for nine months or so.
There’s no indication of any doubt or mistrust left in Joseph. After an angel of the Lord appeared to him in a dream and shared to him very pertinent information regarding the pregnancy and the Child, his conviction was solid. He trusted her, so the reason for him holding off was not in any way negative at all. The Word is silent about it; all we could do is surmise, but whatever his reasons were, it definitely looked more positively and suitably in relation to the prophecy.
True, he didn’t hold off from any sexual relationship with Mary forever. Nine months is a long time, but we know it wasn’t forever. True, Mary had other children; Jesus had brothers and sisters: “Is not this the carpenter, the son of Mary, the brother of James, and Joses, and of Juda, and Simon? and are not his sisters here with us? And they were offended at him” (Mark 6:3). Clearly, Joseph and Mary engaged in procreative activities after the birth of their first born. Our precious Lord Jesus’ birth alone was of a miraculous kind; the rest of them were natural, biological birth, but God’s Word remained true in all of Joseph’s actions and turn of events.
Our sensitivity to situation and our conscientiousness has a big role in living wisely and more efficiently for God and in His Kingdom. There are good choices and bad choices; we choose the good. There are good choices, better choices, and best choices; we choose the best. We care for the welfare of our King and His Kingdom. Praise God for His Word and Holy Spirit Who guides us in navigating through the often complex twists and turns in our world.