Bruce achieved a new level of intimacy by convincing Lance to engage in shrimping, aka the insertion of an erect penis (Bruce) into another man's urethra (Lance), which presumably has been stretched over time (typically by way of an active and sometimes aggressive physical training regimen) in order to accommodate said insertion.
Definition adapted from the America's Cup Sailing Dictionary
We're shrimping! Everybody go forward and get the spinnaker out of the water.
2. The act of ejaculating sperm into someone's anus, and then sucking the sperm out with a straw. Without a straw, this is known as felching.
"I fucked that dude, came in his ass, then sucked every drop out with a straw. Man, I love shrimping!"