speechlessness

noun [抽象名词]一时讲不出话来的样子；哑口无言

There's also another transition that he's making, and this involves the subject of virginity: not a speechlessness, but his actual abstinence.
他还做了另一个转变，这涉及到童贞的话题：，不是哑口无言，而是他实际的节制。