Prom Question

Question:

I had a hypothetical question. 
Is it considered taboo to ask a sophomore to prom? 
 
Phyllis replied:

Why should it be taboo?  If it’s a senior prom, the senior can ask whomever he/she wants.   (A senior invited me when I was a sophomore).  If it’s a junior/senior prom, both juniors and seniors can do the asking.  If it’s a senior girl asking a sophomore guy, why not, as long as he can conduct himself  more like a senior than a sophomore.