Love it! not the stick-tights (poor dog!) - in the midwest we have Virginia stickseed, Hackelia virginiana, a nightmare for dogs. Your dog at least appears to be a short-hair. Collies.... no comment....
You didn't show us the "burr" but the way hundreds of seeds latch onto a passerby sounds like this plant.

Virginia stickseed inhabits moist deciduous forests, usually in areas of high-pH substrate. It was important in Cherokee herbal medicine. The crushed roots were mixed with bear oil and used to treat skin cancers, a tea of the plant was used to treat kidney conditions and improve memory, and the plant was used in love charms. https://gobotany.nativeplanttrust.org/species/hackelia/virginiana/

Love your husband's souvenir!

Love the blue berries - looks like eastern red cedar -

Junipers are members of the Cypress family and are native to Europe, Asia, Africa and North America. Their 'berries', which are actually seed cones with very fleshy, tight scales, were the original flavoring for gin.

Your husband is a keeper. :)
For Valentine's Day, mine knew just what I'd appreciate most.
A little rock from the parking lot at the barber's shop. :)