Ted helps him pull off his sweater, pulling back from the kiss again as it goes over his head, though he doesn't immediately kiss her back after that.

"You know we're gonna have just as much trouble getting these khakis off as it was to put them on, right?" he points out, smiling.

It's alright though, he's not in a rush. Despite what they said about 'getting to the good stuff' before the shower, Ted actually enjoys the process of getting undressed. It's somewhere between domestic intimacy and foreplay.