Important BB defense question

[beachbum]

If I've got a hand like A5, Q9, K6s, or say T9, I'm defending these hands against your usual 20%-30% ASB players. I'd rather play HU against the blind stealer with these kind of hands. However the SB often gets in the way. Whether it's right or wrong, I'm more inclined to fold when the SB calls here rather than when he calls. If he calls I'd rather play a hand like 68s or 33 where my implied odds are higher.

With hands like these (A5, Q9, K6s, or say T9) how does the SB calling influence your decision to defend? Obviously it depends on how bad the SB is. But still, I really don't want to play A5 even getting 5:1 facing a preflop raise.

What do you guys think?