1+1=3 If You Don’t Use a Condom Tee Funny Math Joke Sarcastic Slogan Shirt Gag Gift

5.4K+ bought in past month

$19.99

4.7(44)
in For Couples
Standard Shipping Arrives Oct 17 – 20

Typically delivered in 3–6 business days (US)

  1. Oct 14 Order placed
  2. Oct 15 – 16 Order ships
  3. Oct 17 – 20 Delivered
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  • Total: $0.00
Size guide · How it fits

Unisex T-Shirt · Gildan 5000

Unisex classic fit — true to size. Size up for a looser look.

SizeLengthChest (flat)
S2818
M2920
L3022
XL3124
2XL3226
3XL3328
4XL3430
5XL3532

All measurements in inches. Chest width is laid flat (half chest). View all size charts

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  • 2 items 5% OFF
  • 3 items 10% OFF
  • 4 items 15% OFF
  • 5 items 20% OFF

Arrives by Oct 17 – 20 if you order today. Hooray!

Real customer photos

Alicia
Georgann
Kathleen

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Description

Why this 1+1=3 condom joke shirt delivers instant laughs

This 1+1=3 IF YOU DON’T USE A CONDOM Tee is a funny math joke shirt built for adults who appreciate sarcastic humor, novelty gag gifts, and provocative conversation starters.

shirt

Soft cotton fabric

Crafted from breathable, lightweight ring-spun cotton that provides comfortable all-day wear for casual outings and parties.

printer

Bold typography

Features a high-contrast black ink print on crisp white fabric, making the sarcastic slogan top easily readable from a distance.

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Durable construction

Designed with reinforced shoulder tape and double-needle stitched hems to maintain shape and print integrity through regular washing.

smile

Unisex relaxed fit

Tailored with a classic retail fit that accommodates various body types comfortably for both men and women.

Everyday comfort with bold sarcastic print

This contraceptive math tee delivers an unapologetic punchline that cuts straight to the point. The minimalist white-and-black layout ensures the crude equation remains the focal point, pairing effortlessly with jeans, joggers, or casual shorts for a laid-back look.

Ideal occasions for novelty gag gifts

Bachelor partiesBirthday prank giftsWhite elephant gift exchangesCollege campus eventsCasual weekend partiesAdult comedy nights
Material
100% combed and ring-spun cotton (heather colors contain polyester)
Fit
Unisex adult retail fit
Neckline
Ribbed crewneck
Care Instructions
Machine wash cold inside out with like colors, tumble dry low

Frequently Asked Questions

How does this novelty graphic t-shirt fit?

This shirt features a standard retail unisex fit. We recommend ordering your usual size for a comfortable, relaxed look.

Will the printed text crack or fade in the wash?

The design is printed using direct-to-garment methods with high-durability inks. Washing inside out in cold water preserves the print quality.

What is the meaning behind the 1+1=3 math slogan?

The shirt plays on contraceptive humor, treating unplanned pregnancy as an unexpected mathematical addition problem.

Is this gag gift suitable for birthday parties?

It makes an excellent gag gift for adult friends, siblings, or bachelor parties where irreverent humor is appreciated.

Get your sarcastic math tee today

Add this bold novelty shirt to your wardrobe or surprise a friend with a memorable gag gift that guarantees a reaction.

What our customers say

Real reviews from verified Etsy shoppers.

4.8 (73,575)340K+ salesStar Seller
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Etsy
★★★★★

Loved this T-shirt! The quality of the T-shirt is really good, it's not a cheap, thin T-shirt. I got black sparkles for the design and I love it.…

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Perfect. Just as pictured and described.

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I love my shirt!! It is sooo pretty!!!

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Beautiful shirt. Fast service. Love the color.

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Super nice gift! Delivery took a while but the result is great.

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