A ‘call option’ is not necessarily bullish, nor is a ‘put option’ necessarily bearish.

For example:

• purchasing a call (buying to open) would be a bullish trade while writing a call (selling to open) would be a bearish trade
• similarly someone writing a put would have a bullish lean, while a trader buying a put would be bearish

The ‘bullish’ and ‘bearish’ logic is as follows:

• a CALL at the ASK = bullish
• a CALL at the BID = bearish
• a PUT at the ASK = bearish
• a PUT at the bid = bullish

Keep in mind that this assumes that the trades are being opened, and also assume that a trade taking place at the ask was bought and a trade taking place at the bid was sold.