When Tish asked me to weigh in on the topic of "Seduction Wear vs. Sleep Wear vs. Loungewear," I thought I'd start by asking le monsieur for a view from the male perspective. His response: "We don't care what you wear to sleep in, we just care what you wear to bed." Well.
Creamy silk pajamas, just add Katherine Hepburn and Spencer Tracy, from Wintersilks.
While there may be times that call for the full Fredericks of Hollywood treatment, in those situations comfort is irrelevant as those pieces generally aren't worn for an extended period of time. ;-) But in between naughty-wear and oversized cartoon character sleep shirts, there's a middle ground I think of as allure, and it's achievable on a regular basis. You can find sleepwear that's comfortable, yet pretty enough to garner some favorable attention from that person on the other side of the bed.
Simply perfect from Mary Green.
Little slips with a touch of lace from Julianna Butterfield.
Silk is my first choice for sleepwear, especially silk charmeuse. It has that Jean-Harlow-in-a-dressing-gown glamour and, except during the warmest weather, is comfortable and breathable for sleep. You don't have to pay La Perla prices either to get some nice silk nighties. This nightgown from Mary Green is a pretty choice. If lace bothers you, go for a plain chemise like this one, also from Mary Green. The Juliana Ray "Butterfield" chemise is a nice option if you prefer something a bit longer.
It's cotton (!) "Cool Nights" from Soma.
Silk can be washed in the machine on the gentle cycle (preferably in a lingerie bag, no Woolite) and hung to dry. It generally will dry in a few hours and so is great for travel. But if you're one of those people who finds even lightweight silk too warm to sleep in, the "Cool Nights" pieces from Soma are another alternative. I haven't tried these myself, but some of my "warmer" family members have recommended.
It's my firm belief that we don't have to choose between pretty and comfortable, and what we wear to bed is no exception.