As coined by Denny Crane (Boston Legal), porkeling is the imitation of snorkeling in a sexual conext.
His penis was porkeling toward her vagina as though he were exploring the great barrier reef
1. a male exploring a females nether regions with his.
2. a man rooting around between a woman's legs with his manhood.
3. "That's like when you go snorkeling with your ..." - Denny Crane
"I can still remember the first time Bev let me go porkeling."