In my younger days, I remember getting real tongue tied in a similar situation. Four friends were sitting around a kitchen table with me. The young lady next to me had her shirt open up to expose her small pert breast (no bra); nipple in full view; I was the only one privileged with this angle.

Conversion continued but I was tongue tied. I tried to look away, but my evil eye kept wondering to that open shirt. People must have been wondering what was wrong with me.