I remember going to a sleepover at my cousin
The Naked Truth: Is Sleeping Without Underwear Good for You
Should You Wear Lingerie to Bed?
How Your Underwear Affects Your Vaginal Health – Genial Day
Why Guys Wear Briefs: What are the Advantages? — Pants & Socks
Sleeping in Underwear — Beyond Basics by MeUndies
How—And How Not—To Wear Your Underwear
Is It Good To Sleep Without Underwear for Women? – Q for Quinn™
4 Benefits of Not Wearing Underwear
Should you Wear Underwear to Bed (or Not)? – Cottonique - Allergy
9 Benefits Of Sleeping Naked—Why It's Good To Sleep With No Clothes
The Most Breathable Women's Underwear, According to OB-GYNs