anyone do their run training in 3/4 tights? if so would you use sports underwear? no underwear? trishorts under?

I was about to do my 2 mile run this morning in just the 3/4 tights but then chickened out and threw some shorts on over them. if I bike in them I'll wear my liner or bike shorts under them

I normally just use shorts or loose running pants but this morning's weather called for the 3/4 tights ...