Ted obviously doesn't care about being good at sex for bragging rights, since he never talks about it, or some sort of macho self-confidence. All he cares about is making his partner feel good. And how you do that is mostly just by being attentive and dedicated.

How he proceeds is that immediately at her affirmative, he increases both the firmness and the speed of his hand against her sex, tugging her closer against him. The only way he relents from then on is by focusing more on curling his fingers inside her than on the friction against her clitoris.

He's focused entirely on reading her reactions, her breathing and her sounds, the way she writhes or tenses against him.

Once he can feel her getting close, he whispers into her ear again. "Do you want to come?"