How do you imagine Bulma during a night of passion?
If I remember correctly Bulma didn't like being harassed by Master Roshi. But you have to remember that in several actions Bulma also proved to be quite a perverted girl and more than once she used her body to try to seduce several men.
I still remember that time she showed Goku her panties and would even allow her to be touched by him.
I also remember Goku's epic response and how he left her humiliated XD