No limping in 6 max?

[CptnObvius]

Just wanted to get a majority consensus on limping UTG in 6max with small pairs (55-). I assume most would say you should never limp first in in 6max.

I am curious as to whether, when people are raising with these pairs UTG in 6max they are calling a pot size 3bet or instafolding everytime? Is it entirely/partially opponent specific for you? Would anyone consider 4betting? If you are folding to the 3bet do you feel you lose value by not getting opportunity for a set? Is the best play an 80/20 raise/fold type scenario?

Please add in any other variables/ideas I may have missed. Cheers.