Normally I’m not in favor of math, but adding up the intricacies of time travel in the context of a hot tub has proven to be a surprising amount of fun. You’ve no doubt already seen Hot Tub Time Machine’s poster which explains the time travel process using this equation: Energy Drink + Vodka + Squirrel / Hot Tub = Time Travel. Now they’re applying that same mathematical brilliance to the complexities of love, with a special Hot Tub Time Machine Valentine’s Day message.

Alright so they’re a couple of days late. I guess they feel asleep in the hot tub. Still, it’s the thought that counts, even if it’s late. Watch: