When oneguy watches girls from afar with binoculars while his buddy jerks him off
two guys doing this is how I came up with the "french" part. the peeper being the whole using binoculars to watch girls at the pool and not being about to jerk it without loosing you line of sight. making said guys the french peepers.
When your lady friend has crabs but you cum in her anyway then french kiss the fuck outta that pussy
A: Did y'all have sex? I thought she had crabs?
B: Yeah she does and I gave her a crab rangoon frenchee last night so I bet even my tongue has pubic lice