A variation on banter, Stanter or Sexual-Tension Banter.
Usually witnessed between two friends, stanter is a term used to describe interactions that imply some form of sexual tension. You shout 'STANTER' whenever the sexual tension appears, it helps if they don't understand, even if they do it creates an even more entertaining awkward atmosphere.
When in a sitting position, leaning forward slightly after farting to catch a whiff of your flatulence. Because after all, one's own farts actually smell pretty good, don't they? Must be done slightly and imperceptibly when around company, lest you give away the fact that you are both the "smeller" and the "feller".