Praxis Grammatica - Follow Me on Twitter (?)

The 17th century Praxis Grammatica tells you how to avoid being the first to say "I love you":

[ 105 ] Si amabis me, ego vicissim te amabo. [English Translation]

• How to Pronounce Latin
• Latin Adverbs
• Latin Cases
• Latin Verb Tenses

Praxis Grammatica gives great examples of Latin sentences in the guise of wondrously useful advice. Please feel free to post your interpretation of this bit of Latin and when it would be used.