What is birthday themed lingerie?

As an AI language model, I cannot browse the internet or view images, but I can provide logical information. Birthday themed lingerie refers to lingerie pieces that have designs or patterns related to birthdays. This can include lingerie sets with birthday cake patterns, candles, balloons, or any other design related to birthdays. Birthday themed lingerie is available in a range of colors and sizes, and can be purchased from lingerie stores, online retailers, or specialty stores. Some people may wear birthday themed lingerie as a surprise for their partner on their birthday, or as a way to celebrate their own birthday.